Javascript - how to display line feed and how to output variable to the page
0
In the body, it can't present the variable value, but only shows variable name "var1". Besides, I use "n" in document.write, but how come it doesn't break the line in the result?
<script type="text/javascript">
var var1=123;
document.write("<strong>Hello World! nThis is the second line.</strong>");
</script>
</head>
<body>
<h1>the value for number is: + var1</h1>
</body>
javascript variables line break
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
add a comment |
0
In the body, it can't present the variable value, but only shows variable name "var1". Besides, I use "n" in document.write, but how come it doesn't break the line in the result?
<script type="text/javascript">
var var1=123;
document.write("<strong>Hello World! nThis is the second line.</strong>");
</script>
</head>
<body>
<h1>the value for number is: + var1</h1>
</body>
javascript variables line break
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
You can't display a variable like that. However, you can create a new element with tagh1and format the value of your variable in.
– e.doroskevic
Nov 23 '18 at 23:48
naka, "line feed", doesn't show in HTML, unless it's within<pre>tags*. If you want it on a separate line, then you need to use a<br>tag, or wrap the line(s) in<p>tags. *technically, within any element styled to havewhite-space: pre
– cale_b
Nov 24 '18 at 0:00
1
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06
add a comment |
0
0
0
1
In the body, it can't present the variable value, but only shows variable name "var1". Besides, I use "n" in document.write, but how come it doesn't break the line in the result?
<script type="text/javascript">
var var1=123;
document.write("<strong>Hello World! nThis is the second line.</strong>");
</script>
</head>
<body>
<h1>the value for number is: + var1</h1>
</body>
javascript variables line break
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
In the body, it can't present the variable value, but only shows variable name "var1". Besides, I use "n" in document.write, but how come it doesn't break the line in the result?
<script type="text/javascript">
var var1=123;
document.write("<strong>Hello World! nThis is the second line.</strong>");
</script>
</head>
<body>
<h1>the value for number is: + var1</h1>
</body>
javascript variables line break
javascript variables line break
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
edited Nov 24 '18 at 0:06
cale_b
19.8k44982
19.8k44982
asked Nov 23 '18 at 23:44
CathyCathy
124
asked Nov 23 '18 at 23:44
CathyCathy
124
asked Nov 23 '18 at 23:44
CathyCathy
124
124
You can't display a variable like that. However, you can create a new element with tagh1and format the value of your variable in.
– e.doroskevic
Nov 23 '18 at 23:48
naka, "line feed", doesn't show in HTML, unless it's within<pre>tags*. If you want it on a separate line, then you need to use a<br>tag, or wrap the line(s) in<p>tags. *technically, within any element styled to havewhite-space: pre
– cale_b
Nov 24 '18 at 0:00
1
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06
add a comment |
You can't display a variable like that. However, you can create a new element with tagh1and format the value of your variable in.
– e.doroskevic
Nov 23 '18 at 23:48
naka, "line feed", doesn't show in HTML, unless it's within<pre>tags*. If you want it on a separate line, then you need to use a<br>tag, or wrap the line(s) in<p>tags. *technically, within any element styled to havewhite-space: pre
– cale_b
Nov 24 '18 at 0:00
1
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06
You can't display a variable like that. However, you can create a new element with tag
h1 and format the value of your variable in.– e.doroskevic
Nov 23 '18 at 23:48
You can't display a variable like that. However, you can create a new element with tag
h1 and format the value of your variable in.– e.doroskevic
Nov 23 '18 at 23:48
n aka, "line feed", doesn't show in HTML, unless it's within <pre> tags*. If you want it on a separate line, then you need to use a <br> tag, or wrap the line(s) in <p> tags. *technically, within any element styled to have white-space: pre– cale_b
Nov 24 '18 at 0:00
n aka, "line feed", doesn't show in HTML, unless it's within <pre> tags*. If you want it on a separate line, then you need to use a <br> tag, or wrap the line(s) in <p> tags. *technically, within any element styled to have white-space: pre– cale_b
Nov 24 '18 at 0:00
1
1
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06
add a comment |
3 Answers
3
active
oldest
votes
0
Here is a basic example.
const name = 'john doe';
const header = document.createElement('h1');
const text = document.createTextNode(`my name is ${name}`);
header.appendChild(text);
document.body.appendChild(header);
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
More practical way to do it is using textContent property of HTML nodes.const myDiv = document.querySelector('#some-id');const myVariable = 'Some data about something';myDiv.textContent = myVariable;if you'd like to concatenate to the existing stringmyDiv.textContent = myDiv.textContent + ' Some more string';
– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
add a comment |
0
Use the line-break tag, br, instead of n.
As for the displaying the variable:
The variable var1 can only be used inside the javascript code block. The line
<h1>the value for number is: + var1</h1>
will not be executed as actual javascript code since it is not inside the javascript block. You can do it like this:
<head />
<script>
function main() {
var var1=123;
document.getElementById("text").innerHTML += var1
}
document.write("<strong>Hello World! <br />This is the second line.</strong>");
</script>
</head>
<body onLoad="main()">
<h1 id="text">the value for number is: </h1>
</body>
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
add a comment |
0
As for the variable part of the question, there are at least 2 ways of achieving what you want:
Method 1
Use DOM Manipulation to change the inner text of the h1 tag like so:
var var1=123;
document.getElementsByTagName('h1')[0].innerText = "the value for number is: " + var1
Method 2
You can write html in EJS(Embedded Javascript) format, where in essence you can pass variables directly to the html tags:
<% var var1=123; %>
<h1>the value for number is: <%= var1 %></h1>
If you are interested in learning about EJS then look here. It's worth mentioning that EJS is an external library (thanks cale_b for pointing this out in the comments)
As for the break part of the question, you need to replace "n":
document.write("<strong>Hello World! <br/>This is the second line.</strong>");
answered Nov 24 '18 at 0:03
DevticianDevtician
266
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
Here is a basic example.
const name = 'john doe';
const header = document.createElement('h1');
const text = document.createTextNode(`my name is ${name}`);
header.appendChild(text);
document.body.appendChild(header);
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
More practical way to do it is using textContent property of HTML nodes.const myDiv = document.querySelector('#some-id');const myVariable = 'Some data about something';myDiv.textContent = myVariable;if you'd like to concatenate to the existing stringmyDiv.textContent = myDiv.textContent + ' Some more string';
– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
add a comment |
0
Here is a basic example.
const name = 'john doe';
const header = document.createElement('h1');
const text = document.createTextNode(`my name is ${name}`);
header.appendChild(text);
document.body.appendChild(header);
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
More practical way to do it is using textContent property of HTML nodes.const myDiv = document.querySelector('#some-id');const myVariable = 'Some data about something';myDiv.textContent = myVariable;if you'd like to concatenate to the existing stringmyDiv.textContent = myDiv.textContent + ' Some more string';
– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
add a comment |
0
0
0
Here is a basic example.
const name = 'john doe';
const header = document.createElement('h1');
const text = document.createTextNode(`my name is ${name}`);
header.appendChild(text);
document.body.appendChild(header);
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
Here is a basic example.
const name = 'john doe';
const header = document.createElement('h1');
const text = document.createTextNode(`my name is ${name}`);
header.appendChild(text);
document.body.appendChild(header);
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
edited Nov 23 '18 at 23:57
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
answered Nov 23 '18 at 23:54
e.doroskevice.doroskevic
1,6711123
1,6711123
More practical way to do it is using textContent property of HTML nodes.const myDiv = document.querySelector('#some-id');const myVariable = 'Some data about something';myDiv.textContent = myVariable;if you'd like to concatenate to the existing stringmyDiv.textContent = myDiv.textContent + ' Some more string';
– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
add a comment |
More practical way to do it is using textContent property of HTML nodes.const myDiv = document.querySelector('#some-id');const myVariable = 'Some data about something';myDiv.textContent = myVariable;if you'd like to concatenate to the existing stringmyDiv.textContent = myDiv.textContent + ' Some more string';
– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
More practical way to do it is using textContent property of HTML nodes.
const myDiv = document.querySelector('#some-id'); const myVariable = 'Some data about something'; myDiv.textContent = myVariable; if you'd like to concatenate to the existing string myDiv.textContent = myDiv.textContent + ' Some more string';– Ertan Kara
Nov 23 '18 at 23:57
More practical way to do it is using textContent property of HTML nodes.
const myDiv = document.querySelector('#some-id'); const myVariable = 'Some data about something'; myDiv.textContent = myVariable; if you'd like to concatenate to the existing string myDiv.textContent = myDiv.textContent + ' Some more string';– Ertan Kara
Nov 23 '18 at 23:57
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
Might be better to mark this question as a duplicate (which it is), rather than offering a new answer :) To understand why, maybe check this out: meta.stackexchange.com/a/10844/178653
– cale_b
Nov 24 '18 at 0:03
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
@cale_b i agree :)
– e.doroskevic
Nov 24 '18 at 0:06
add a comment |
0
Use the line-break tag, br, instead of n.
As for the displaying the variable:
The variable var1 can only be used inside the javascript code block. The line
<h1>the value for number is: + var1</h1>
will not be executed as actual javascript code since it is not inside the javascript block. You can do it like this:
<head />
<script>
function main() {
var var1=123;
document.getElementById("text").innerHTML += var1
}
document.write("<strong>Hello World! <br />This is the second line.</strong>");
</script>
</head>
<body onLoad="main()">
<h1 id="text">the value for number is: </h1>
</body>
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
add a comment |
0
Use the line-break tag, br, instead of n.
As for the displaying the variable:
The variable var1 can only be used inside the javascript code block. The line
<h1>the value for number is: + var1</h1>
will not be executed as actual javascript code since it is not inside the javascript block. You can do it like this:
<head />
<script>
function main() {
var var1=123;
document.getElementById("text").innerHTML += var1
}
document.write("<strong>Hello World! <br />This is the second line.</strong>");
</script>
</head>
<body onLoad="main()">
<h1 id="text">the value for number is: </h1>
</body>
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
add a comment |
0
0
0
Use the line-break tag, br, instead of n.
As for the displaying the variable:
The variable var1 can only be used inside the javascript code block. The line
<h1>the value for number is: + var1</h1>
will not be executed as actual javascript code since it is not inside the javascript block. You can do it like this:
<head />
<script>
function main() {
var var1=123;
document.getElementById("text").innerHTML += var1
}
document.write("<strong>Hello World! <br />This is the second line.</strong>");
</script>
</head>
<body onLoad="main()">
<h1 id="text">the value for number is: </h1>
</body>
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
Use the line-break tag, br, instead of n.
As for the displaying the variable:
The variable var1 can only be used inside the javascript code block. The line
<h1>the value for number is: + var1</h1>
will not be executed as actual javascript code since it is not inside the javascript block. You can do it like this:
<head />
<script>
function main() {
var var1=123;
document.getElementById("text").innerHTML += var1
}
document.write("<strong>Hello World! <br />This is the second line.</strong>");
</script>
</head>
<body onLoad="main()">
<h1 id="text">the value for number is: </h1>
</body>
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
answered Nov 24 '18 at 0:01
Viktor WViktor W
564
564
add a comment |
add a comment |
0
As for the variable part of the question, there are at least 2 ways of achieving what you want:
Method 1
Use DOM Manipulation to change the inner text of the h1 tag like so:
var var1=123;
document.getElementsByTagName('h1')[0].innerText = "the value for number is: " + var1
Method 2
You can write html in EJS(Embedded Javascript) format, where in essence you can pass variables directly to the html tags:
<% var var1=123; %>
<h1>the value for number is: <%= var1 %></h1>
If you are interested in learning about EJS then look here. It's worth mentioning that EJS is an external library (thanks cale_b for pointing this out in the comments)
As for the break part of the question, you need to replace "n":
document.write("<strong>Hello World! <br/>This is the second line.</strong>");
answered Nov 24 '18 at 0:03
DevticianDevtician
266
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
add a comment |
0
As for the variable part of the question, there are at least 2 ways of achieving what you want:
Method 1
Use DOM Manipulation to change the inner text of the h1 tag like so:
var var1=123;
document.getElementsByTagName('h1')[0].innerText = "the value for number is: " + var1
Method 2
You can write html in EJS(Embedded Javascript) format, where in essence you can pass variables directly to the html tags:
<% var var1=123; %>
<h1>the value for number is: <%= var1 %></h1>
If you are interested in learning about EJS then look here. It's worth mentioning that EJS is an external library (thanks cale_b for pointing this out in the comments)
As for the break part of the question, you need to replace "n":
document.write("<strong>Hello World! <br/>This is the second line.</strong>");
answered Nov 24 '18 at 0:03
DevticianDevtician
266
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
add a comment |
0
0
0
As for the variable part of the question, there are at least 2 ways of achieving what you want:
Method 1
Use DOM Manipulation to change the inner text of the h1 tag like so:
var var1=123;
document.getElementsByTagName('h1')[0].innerText = "the value for number is: " + var1
Method 2
You can write html in EJS(Embedded Javascript) format, where in essence you can pass variables directly to the html tags:
<% var var1=123; %>
<h1>the value for number is: <%= var1 %></h1>
If you are interested in learning about EJS then look here. It's worth mentioning that EJS is an external library (thanks cale_b for pointing this out in the comments)
As for the break part of the question, you need to replace "n":
document.write("<strong>Hello World! <br/>This is the second line.</strong>");
answered Nov 24 '18 at 0:03
DevticianDevtician
266
As for the variable part of the question, there are at least 2 ways of achieving what you want:
Method 1
Use DOM Manipulation to change the inner text of the h1 tag like so:
var var1=123;
document.getElementsByTagName('h1')[0].innerText = "the value for number is: " + var1
Method 2
You can write html in EJS(Embedded Javascript) format, where in essence you can pass variables directly to the html tags:
<% var var1=123; %>
<h1>the value for number is: <%= var1 %></h1>
If you are interested in learning about EJS then look here. It's worth mentioning that EJS is an external library (thanks cale_b for pointing this out in the comments)
As for the break part of the question, you need to replace "n":
document.write("<strong>Hello World! <br/>This is the second line.</strong>");
answered Nov 24 '18 at 0:03
DevticianDevtician
266
edited Nov 24 '18 at 0:12
answered Nov 24 '18 at 0:03
DevticianDevtician
266
answered Nov 24 '18 at 0:03
DevticianDevtician
266
answered Nov 24 '18 at 0:03
DevticianDevtician
266
266
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
add a comment |
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
It's worth mentioning that ejs is a library, may not be worth the overhead to bring in a library. If OP is going to do a lot of this, then it may make sense - but IMO there's usually a lighter-weight way to solve problems like this.
– cale_b
Nov 24 '18 at 0:05
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
@cale_b I agree, it does require installing an external library, that's why I have provided 2 methods of solving this problem, where method 1 does not require external libraries, and method 2 does. This way the OP can choose, which method is more suitable in his/her situation.
– Devtician
Nov 24 '18 at 0:09
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You can't display a variable like that. However, you can create a new element with tag
h1and format the value of your variable in.– e.doroskevic
Nov 23 '18 at 23:48
naka, "line feed", doesn't show in HTML, unless it's within<pre>tags*. If you want it on a separate line, then you need to use a<br>tag, or wrap the line(s) in<p>tags. *technically, within any element styled to havewhite-space: pre– cale_b
Nov 24 '18 at 0:00
1
Possible duplicate of how to display a javascript var in html body
– cale_b
Nov 24 '18 at 0:02
Please read How to Ask, and pay special attention to the part about only asking one question at a time.
– cale_b
Nov 24 '18 at 0:06