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To manipulate form elements using JavaScript, you can access them using the _________________()
or ____________________()
methods. These methods allow you to select the form element based on its ___________
or a CSS ____.
For example, let's say we have a form with an input field and a submit button:
1<form id="myForm">
2 <input type="text" id="myInput">
3 <button type="submit">Submit</button>
4</form>
We can select the form and add an event listener to handle the form submission:
1const form = ______._________________('myForm');
2
3form.addEventListener('submit', function(event) {
4 event.preventDefault();
5 // Handle form submission
6});
In the code above, we first select the form element using ______________________()
and store it in the _________
variable. Then, we add an event listener to the form's ___________
event. Inside the event listener function, we can prevent the default form submission behavior using __________._______________()
.
You can also access individual form elements inside the event listener function using their ________
or CSS ____.
Form manipulation involves various tasks such as validation, data retrieval, and form submission. Using JavaScript, you can perform these tasks by manipulating the form elements' ___ and __.
1const form = ______._________________('myForm');
2const input = ________.__________________('myInput');
3
4form.addEventListener('submit', function(event) {
5 event.preventDefault();
6
7 // Get the input field value
8 const inputValue = ________.__________;
9
10 // Perform validation
11 if (inputValue.__________ === 0) {
12 alert('Please enter a value');
13 return;
14 }
15
16 // Perform form submission
17 // ...
18});
Write the missing line below.