React JS- Is React re-render the web page after form submitting?
I am so new in React JS. I am not maintaining a code that is written by someone else. My question may be too basic, sorry for this.
There is a form in the page. Is page is re-rendered after clicking the Submit button ? In my onSubmit method, there is not a code piece that re-render the web page. For example, after submitting the form, I want to set a label "Register is successful or not". Also if there is a validation error in the form, I want to colorize the input fields.
Actually I do not know when react re-renders page and which part of the page it renders ? How can I force React to re-render somewhere in the page ?
This is my onSubmit method;
onSubmit(e) {
e.preventDefault();
this.setState({
loading: true,
});
setTimeout(() => {
this.setState({
loading: false,
});
}, 1000);
const data = this.constructFormData();
fetch('/register', {
method: 'POST',
body: data,
})
.then(p => {
if (p.status === 200) {
return p.json();
}
throw '500';
})
.catch(err => {
this.setState({
error: true,
});
});
}
And below is my form definition ;
<form
id="register-form"
method="POST"
onSubmit={this.onSubmit}
autoComplete="off"
>
javascript reactjs
edited yesterday
Praveen Kumar Purushothaman
131k23135181
asked yesterday
mhendek
47110
add a comment |
I am so new in React JS. I am not maintaining a code that is written by someone else. My question may be too basic, sorry for this.
There is a form in the page. Is page is re-rendered after clicking the Submit button ? In my onSubmit method, there is not a code piece that re-render the web page. For example, after submitting the form, I want to set a label "Register is successful or not". Also if there is a validation error in the form, I want to colorize the input fields.
Actually I do not know when react re-renders page and which part of the page it renders ? How can I force React to re-render somewhere in the page ?
This is my onSubmit method;
onSubmit(e) {
e.preventDefault();
this.setState({
loading: true,
});
setTimeout(() => {
this.setState({
loading: false,
});
}, 1000);
const data = this.constructFormData();
fetch('/register', {
method: 'POST',
body: data,
})
.then(p => {
if (p.status === 200) {
return p.json();
}
throw '500';
})
.catch(err => {
this.setState({
error: true,
});
});
}
And below is my form definition ;
<form
id="register-form"
method="POST"
onSubmit={this.onSubmit}
autoComplete="off"
>
javascript reactjs
edited yesterday
Praveen Kumar Purushothaman
131k23135181
asked yesterday
mhendek
47110
1
Can I recommend you to putthis.setState({ loading: false, });in the promise.then(p => { if (p.status === 200) { return p.json(); } throw '500'; })That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.
– Mirakurun
yesterday
add a comment |
I am so new in React JS. I am not maintaining a code that is written by someone else. My question may be too basic, sorry for this.
There is a form in the page. Is page is re-rendered after clicking the Submit button ? In my onSubmit method, there is not a code piece that re-render the web page. For example, after submitting the form, I want to set a label "Register is successful or not". Also if there is a validation error in the form, I want to colorize the input fields.
Actually I do not know when react re-renders page and which part of the page it renders ? How can I force React to re-render somewhere in the page ?
This is my onSubmit method;
onSubmit(e) {
e.preventDefault();
this.setState({
loading: true,
});
setTimeout(() => {
this.setState({
loading: false,
});
}, 1000);
const data = this.constructFormData();
fetch('/register', {
method: 'POST',
body: data,
})
.then(p => {
if (p.status === 200) {
return p.json();
}
throw '500';
})
.catch(err => {
this.setState({
error: true,
});
});
}
And below is my form definition ;
<form
id="register-form"
method="POST"
onSubmit={this.onSubmit}
autoComplete="off"
>
javascript reactjs
edited yesterday
Praveen Kumar Purushothaman
131k23135181
asked yesterday
mhendek
47110
I am so new in React JS. I am not maintaining a code that is written by someone else. My question may be too basic, sorry for this.
There is a form in the page. Is page is re-rendered after clicking the Submit button ? In my onSubmit method, there is not a code piece that re-render the web page. For example, after submitting the form, I want to set a label "Register is successful or not". Also if there is a validation error in the form, I want to colorize the input fields.
Actually I do not know when react re-renders page and which part of the page it renders ? How can I force React to re-render somewhere in the page ?
This is my onSubmit method;
onSubmit(e) {
e.preventDefault();
this.setState({
loading: true,
});
setTimeout(() => {
this.setState({
loading: false,
});
}, 1000);
const data = this.constructFormData();
fetch('/register', {
method: 'POST',
body: data,
})
.then(p => {
if (p.status === 200) {
return p.json();
}
throw '500';
})
.catch(err => {
this.setState({
error: true,
});
});
}
And below is my form definition ;
<form
id="register-form"
method="POST"
onSubmit={this.onSubmit}
autoComplete="off"
>
javascript reactjs
javascript reactjs
edited yesterday
Praveen Kumar Purushothaman
131k23135181
asked yesterday
mhendek
47110
edited yesterday
Praveen Kumar Purushothaman
131k23135181
asked yesterday
mhendek
47110
edited yesterday
Praveen Kumar Purushothaman
131k23135181
edited yesterday
Praveen Kumar Purushothaman
131k23135181
edited yesterday
Praveen Kumar Purushothaman
131k23135181
131k23135181
asked yesterday
mhendek
47110
asked yesterday
mhendek
47110
asked yesterday
mhendek
47110
47110
1
Can I recommend you to putthis.setState({ loading: false, });in the promise.then(p => { if (p.status === 200) { return p.json(); } throw '500'; })That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.
– Mirakurun
yesterday
add a comment |
1
Can I recommend you to putthis.setState({ loading: false, });in the promise.then(p => { if (p.status === 200) { return p.json(); } throw '500'; })That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.
– Mirakurun
yesterday
1
1
Can I recommend you to put
this.setState({ loading: false, }); in the promise .then(p => { if (p.status === 200) { return p.json(); } throw '500'; }) That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.– Mirakurun
yesterday
Can I recommend you to put
this.setState({ loading: false, }); in the promise .then(p => { if (p.status === 200) { return p.json(); } throw '500'; }) That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.– Mirakurun
yesterday
add a comment |
2 Answers
2
active
oldest
votes
Actually I do not know when react re-renders page and which part of the page it renders ?
It renders the page once, then it only rerenders a component where the state was changed using setState. If that rerender adds new elements, they get rendered too.
How can I force React to re-render somewhere in the page
Move the data that changes into the state and call setState if it changes.
answered yesterday
Jonas Wilms
54.9k42750
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then insiderender()only return the textbox the state indicates
– Jonas Wilms
yesterday
add a comment |
whenever you call setState(), form re-renders.
You can learn about setState in doc.
You can force re-render using forceUpdate(), but it is not advisable. Alternatively, you can do this.setState(this.state)
answered yesterday
Ashish
534519
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
add a comment |
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2 Answers
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2 Answers
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active
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votes
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oldest
votes
Actually I do not know when react re-renders page and which part of the page it renders ?
It renders the page once, then it only rerenders a component where the state was changed using setState. If that rerender adds new elements, they get rendered too.
How can I force React to re-render somewhere in the page
Move the data that changes into the state and call setState if it changes.
answered yesterday
Jonas Wilms
54.9k42750
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then insiderender()only return the textbox the state indicates
– Jonas Wilms
yesterday
add a comment |
Actually I do not know when react re-renders page and which part of the page it renders ?
It renders the page once, then it only rerenders a component where the state was changed using setState. If that rerender adds new elements, they get rendered too.
How can I force React to re-render somewhere in the page
Move the data that changes into the state and call setState if it changes.
answered yesterday
Jonas Wilms
54.9k42750
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then insiderender()only return the textbox the state indicates
– Jonas Wilms
yesterday
add a comment |
Actually I do not know when react re-renders page and which part of the page it renders ?
It renders the page once, then it only rerenders a component where the state was changed using setState. If that rerender adds new elements, they get rendered too.
How can I force React to re-render somewhere in the page
Move the data that changes into the state and call setState if it changes.
answered yesterday
Jonas Wilms
54.9k42750
Actually I do not know when react re-renders page and which part of the page it renders ?
It renders the page once, then it only rerenders a component where the state was changed using setState. If that rerender adds new elements, they get rendered too.
How can I force React to re-render somewhere in the page
Move the data that changes into the state and call setState if it changes.
answered yesterday
Jonas Wilms
54.9k42750
edited yesterday
answered yesterday
Jonas Wilms
54.9k42750
answered yesterday
Jonas Wilms
54.9k42750
answered yesterday
Jonas Wilms
54.9k42750
54.9k42750
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then insiderender()only return the textbox the state indicates
– Jonas Wilms
yesterday
add a comment |
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then insiderender()only return the textbox the state indicates
– Jonas Wilms
yesterday
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
do you mean the all page from the component ? For example I have a web page and my class definiton starts with class App extends Component { ... I have 4 textbox in this page. Can I render only one textbox in this page ?
– mhendek
yesterday
@mhendek then add a state to App that stores which textbox to show, then inside
render() only return the textbox the state indicates– Jonas Wilms
yesterday
@mhendek then add a state to App that stores which textbox to show, then inside
render() only return the textbox the state indicates– Jonas Wilms
yesterday
add a comment |
whenever you call setState(), form re-renders.
You can learn about setState in doc.
You can force re-render using forceUpdate(), but it is not advisable. Alternatively, you can do this.setState(this.state)
answered yesterday
Ashish
534519
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
add a comment |
whenever you call setState(), form re-renders.
You can learn about setState in doc.
You can force re-render using forceUpdate(), but it is not advisable. Alternatively, you can do this.setState(this.state)
answered yesterday
Ashish
534519
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
add a comment |
whenever you call setState(), form re-renders.
You can learn about setState in doc.
You can force re-render using forceUpdate(), but it is not advisable. Alternatively, you can do this.setState(this.state)
answered yesterday
Ashish
534519
whenever you call setState(), form re-renders.
You can learn about setState in doc.
You can force re-render using forceUpdate(), but it is not advisable. Alternatively, you can do this.setState(this.state)
answered yesterday
Ashish
534519
answered yesterday
Ashish
534519
answered yesterday
Ashish
534519
answered yesterday
Ashish
534519
534519
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
add a comment |
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
Is React renders as soon as the state was changed ? In my case, I can set a state value (for example a label text) before submitting form.Will it be rendered immediately ?
– mhendek
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
SetState is asynchronous. The function that is executing will complete it's execution first, then only it will re-render.
– Ashish
yesterday
add a comment |
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1
Can I recommend you to put
this.setState({ loading: false, });in the promise.then(p => { if (p.status === 200) { return p.json(); } throw '500'; })That will stop the loading as soon as you get the response which is much better than fixed 1 second with setTimeout.– Mirakurun
yesterday