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Live form validation using javascript
I want to do live form validation using javascript like if I type number in text field it should give error message instantly or vice versa.How can I achieve this.
javascript
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
add a comment |
I want to do live form validation using javascript like if I type number in text field it should give error message instantly or vice versa.How can I achieve this.
javascript
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07
add a comment |
I want to do live form validation using javascript like if I type number in text field it should give error message instantly or vice versa.How can I achieve this.
javascript
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
I want to do live form validation using javascript like if I type number in text field it should give error message instantly or vice versa.How can I achieve this.
javascript
javascript
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
asked Nov 22 '18 at 7:02
Asim MalikAsim Malik
316
316
Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07
add a comment |
Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07
Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07
Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07
add a comment |
1 Answer
1
active
oldest
votes
You need to start by detecting changes in the input entries. You can do that easily by using the oninput event (read more here).
Looking at that example:
<script>
window.addEventListener('input', function (e) {
console.log("input event detected! coming from this element:", e.target);
}, false);
</script>
<input placeholder="type here and see console.">
Each time your input value changes, an event will be fired an received in that listener.
In your case, you need to add an event listener for each of the inputs and, instead of doing a console.log in the handler function, just call a generic function that will validate all the values for all the inputs in the form.
For the validations, you can look at multiple libraries, like validate.js or jQuery Validation. Also, take a look at validator.js.
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
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
You need to start by detecting changes in the input entries. You can do that easily by using the oninput event (read more here).
Looking at that example:
<script>
window.addEventListener('input', function (e) {
console.log("input event detected! coming from this element:", e.target);
}, false);
</script>
<input placeholder="type here and see console.">
Each time your input value changes, an event will be fired an received in that listener.
In your case, you need to add an event listener for each of the inputs and, instead of doing a console.log in the handler function, just call a generic function that will validate all the values for all the inputs in the form.
For the validations, you can look at multiple libraries, like validate.js or jQuery Validation. Also, take a look at validator.js.
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
add a comment |
You need to start by detecting changes in the input entries. You can do that easily by using the oninput event (read more here).
Looking at that example:
<script>
window.addEventListener('input', function (e) {
console.log("input event detected! coming from this element:", e.target);
}, false);
</script>
<input placeholder="type here and see console.">
Each time your input value changes, an event will be fired an received in that listener.
In your case, you need to add an event listener for each of the inputs and, instead of doing a console.log in the handler function, just call a generic function that will validate all the values for all the inputs in the form.
For the validations, you can look at multiple libraries, like validate.js or jQuery Validation. Also, take a look at validator.js.
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
add a comment |
You need to start by detecting changes in the input entries. You can do that easily by using the oninput event (read more here).
Looking at that example:
<script>
window.addEventListener('input', function (e) {
console.log("input event detected! coming from this element:", e.target);
}, false);
</script>
<input placeholder="type here and see console.">
Each time your input value changes, an event will be fired an received in that listener.
In your case, you need to add an event listener for each of the inputs and, instead of doing a console.log in the handler function, just call a generic function that will validate all the values for all the inputs in the form.
For the validations, you can look at multiple libraries, like validate.js or jQuery Validation. Also, take a look at validator.js.
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
You need to start by detecting changes in the input entries. You can do that easily by using the oninput event (read more here).
Looking at that example:
<script>
window.addEventListener('input', function (e) {
console.log("input event detected! coming from this element:", e.target);
}, false);
</script>
<input placeholder="type here and see console.">
Each time your input value changes, an event will be fired an received in that listener.
In your case, you need to add an event listener for each of the inputs and, instead of doing a console.log in the handler function, just call a generic function that will validate all the values for all the inputs in the form.
For the validations, you can look at multiple libraries, like validate.js or jQuery Validation. Also, take a look at validator.js.
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
edited Nov 22 '18 at 15:44
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
answered Nov 22 '18 at 15:38
gd.silvagd.silva
3631414
3631414
add a comment |
add a comment |
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Please show some attempts/code so that we may be able to help better
– Ahmad
Nov 22 '18 at 7:07