Function outside React class method undefined
up vote
2
down vote
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I keep getting that the first function (breakValueBegins) is not defined. Why does this happen? (I´m pretty sure it should be within handleTimer´s scope). I basically want this function to run when timer reaches zero.
class Clock extends Component {
constructor(props) {
super(props);
this.state ={
breakSession:5,
session:25,
timer: 1500,
isPaused:true,
breakValue:300
}
this.handleTimer=this.handleTimer.bind(this);
}
breakValueBegins(){
let timer=this.state.timer;
this.Interval=setInterval(() => {
this.setState({
breakValue: this.state.breakValue - 1, isPaused:false
})},1000)
}
handleTimer(evt){
const id=evt.target.id;
let isPaused=this.state.isPaused;
clearInterval(this.Interval)
this.Interval=setInterval(() => {
let timer=this.state.timer;
if(timer > 0){
this.setState({
timer: this.state.timer - 1, isPaused:false
})
}if(id==="reset"){
clearInterval(this.Interval);
this.setState((state) => ({
session: 25, timer:1500, breakSession:5, isPaused:true}))
}
if(!isPaused){
clearInterval(this.Interval);
this.setState((state) => ({
isPaused:true}))
}
if(timer===0){
breakBegins()
}},1000)}
javascript reactjs
asked Nov 20 at 0:10
Hernan Ariel
13817
add a comment |
up vote
2
down vote
favorite
I keep getting that the first function (breakValueBegins) is not defined. Why does this happen? (I´m pretty sure it should be within handleTimer´s scope). I basically want this function to run when timer reaches zero.
class Clock extends Component {
constructor(props) {
super(props);
this.state ={
breakSession:5,
session:25,
timer: 1500,
isPaused:true,
breakValue:300
}
this.handleTimer=this.handleTimer.bind(this);
}
breakValueBegins(){
let timer=this.state.timer;
this.Interval=setInterval(() => {
this.setState({
breakValue: this.state.breakValue - 1, isPaused:false
})},1000)
}
handleTimer(evt){
const id=evt.target.id;
let isPaused=this.state.isPaused;
clearInterval(this.Interval)
this.Interval=setInterval(() => {
let timer=this.state.timer;
if(timer > 0){
this.setState({
timer: this.state.timer - 1, isPaused:false
})
}if(id==="reset"){
clearInterval(this.Interval);
this.setState((state) => ({
session: 25, timer:1500, breakSession:5, isPaused:true}))
}
if(!isPaused){
clearInterval(this.Interval);
this.setState((state) => ({
isPaused:true}))
}
if(timer===0){
breakBegins()
}},1000)}
javascript reactjs
asked Nov 20 at 0:10
Hernan Ariel
13817
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I keep getting that the first function (breakValueBegins) is not defined. Why does this happen? (I´m pretty sure it should be within handleTimer´s scope). I basically want this function to run when timer reaches zero.
class Clock extends Component {
constructor(props) {
super(props);
this.state ={
breakSession:5,
session:25,
timer: 1500,
isPaused:true,
breakValue:300
}
this.handleTimer=this.handleTimer.bind(this);
}
breakValueBegins(){
let timer=this.state.timer;
this.Interval=setInterval(() => {
this.setState({
breakValue: this.state.breakValue - 1, isPaused:false
})},1000)
}
handleTimer(evt){
const id=evt.target.id;
let isPaused=this.state.isPaused;
clearInterval(this.Interval)
this.Interval=setInterval(() => {
let timer=this.state.timer;
if(timer > 0){
this.setState({
timer: this.state.timer - 1, isPaused:false
})
}if(id==="reset"){
clearInterval(this.Interval);
this.setState((state) => ({
session: 25, timer:1500, breakSession:5, isPaused:true}))
}
if(!isPaused){
clearInterval(this.Interval);
this.setState((state) => ({
isPaused:true}))
}
if(timer===0){
breakBegins()
}},1000)}
javascript reactjs
asked Nov 20 at 0:10
Hernan Ariel
13817
I keep getting that the first function (breakValueBegins) is not defined. Why does this happen? (I´m pretty sure it should be within handleTimer´s scope). I basically want this function to run when timer reaches zero.
class Clock extends Component {
constructor(props) {
super(props);
this.state ={
breakSession:5,
session:25,
timer: 1500,
isPaused:true,
breakValue:300
}
this.handleTimer=this.handleTimer.bind(this);
}
breakValueBegins(){
let timer=this.state.timer;
this.Interval=setInterval(() => {
this.setState({
breakValue: this.state.breakValue - 1, isPaused:false
})},1000)
}
handleTimer(evt){
const id=evt.target.id;
let isPaused=this.state.isPaused;
clearInterval(this.Interval)
this.Interval=setInterval(() => {
let timer=this.state.timer;
if(timer > 0){
this.setState({
timer: this.state.timer - 1, isPaused:false
})
}if(id==="reset"){
clearInterval(this.Interval);
this.setState((state) => ({
session: 25, timer:1500, breakSession:5, isPaused:true}))
}
if(!isPaused){
clearInterval(this.Interval);
this.setState((state) => ({
isPaused:true}))
}
if(timer===0){
breakBegins()
}},1000)}
javascript reactjs
javascript reactjs
asked Nov 20 at 0:10
Hernan Ariel
13817
asked Nov 20 at 0:10
Hernan Ariel
13817
edited Nov 20 at 0:22
asked Nov 20 at 0:10
Hernan Ariel
13817
asked Nov 20 at 0:10
Hernan Ariel
13817
asked Nov 20 at 0:10
Hernan Ariel
13817
13817
add a comment |
add a comment |
1 Answer
1
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oldest
votes
up vote
1
down vote
accepted
I'm assuming that these methods are part of a component class that isn't shown in your code. This gets into oddities of using classes in JavaScript. I recommend looking through the handling events portion of the React documentation. In your constructor, you should bind your event handler:
this.handleTimer = this.handleTimer.bind(this);
and then you should be able to successfully refer to this.breakValueBegins().
This type of confusion when working with classes is one of the reasons behind the new (alpha only right now) hooks feature in React that allows avoiding class-based components.
answered Nov 20 at 0:19
Ryan C
723210
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
I'm assuming that these methods are part of a component class that isn't shown in your code. This gets into oddities of using classes in JavaScript. I recommend looking through the handling events portion of the React documentation. In your constructor, you should bind your event handler:
this.handleTimer = this.handleTimer.bind(this);
and then you should be able to successfully refer to this.breakValueBegins().
This type of confusion when working with classes is one of the reasons behind the new (alpha only right now) hooks feature in React that allows avoiding class-based components.
answered Nov 20 at 0:19
Ryan C
723210
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
add a comment |
up vote
1
down vote
accepted
I'm assuming that these methods are part of a component class that isn't shown in your code. This gets into oddities of using classes in JavaScript. I recommend looking through the handling events portion of the React documentation. In your constructor, you should bind your event handler:
this.handleTimer = this.handleTimer.bind(this);
and then you should be able to successfully refer to this.breakValueBegins().
This type of confusion when working with classes is one of the reasons behind the new (alpha only right now) hooks feature in React that allows avoiding class-based components.
answered Nov 20 at 0:19
Ryan C
723210
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
add a comment |
up vote
1
down vote
accepted
up vote
1
down vote
accepted
I'm assuming that these methods are part of a component class that isn't shown in your code. This gets into oddities of using classes in JavaScript. I recommend looking through the handling events portion of the React documentation. In your constructor, you should bind your event handler:
this.handleTimer = this.handleTimer.bind(this);
and then you should be able to successfully refer to this.breakValueBegins().
This type of confusion when working with classes is one of the reasons behind the new (alpha only right now) hooks feature in React that allows avoiding class-based components.
answered Nov 20 at 0:19
Ryan C
723210
I'm assuming that these methods are part of a component class that isn't shown in your code. This gets into oddities of using classes in JavaScript. I recommend looking through the handling events portion of the React documentation. In your constructor, you should bind your event handler:
this.handleTimer = this.handleTimer.bind(this);
and then you should be able to successfully refer to this.breakValueBegins().
This type of confusion when working with classes is one of the reasons behind the new (alpha only right now) hooks feature in React that allows avoiding class-based components.
answered Nov 20 at 0:19
Ryan C
723210
answered Nov 20 at 0:19
Ryan C
723210
answered Nov 20 at 0:19
Ryan C
723210
answered Nov 20 at 0:19
Ryan C
723210
723210
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
add a comment |
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
It´s binded already. I´ll update the question with the whole code.
– Hernan Ariel
Nov 20 at 0:21
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Please check the updated post.
– Hernan Ariel
Nov 20 at 0:22
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
Then I think you just need to add “this.” to the breakValueBegins call.
– Ryan C
Nov 20 at 0:23
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
It looks like you’re calling breakBegins instead of breakValueBegins.
– Ryan C
Nov 20 at 0:24
add a comment |
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