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How to reset javascript

王林
王林Original
2023-05-17 15:41:091763browse

JavaScript is a commonly used scripting language used for web front-end development and interaction design, such as realizing form verification and interactive effects. During the development of web pages, you may encounter the need to reset form data. So, how does JavaScript reset the form?

What is form reset?

Resetting the form means clearing the data filled in the form and restoring it to the state when the form was initialized. After the user fills in some information and submits the form, if they need to fill it in again, an easy way is to reset the form.

Use JavaScript to reset the form

In JavaScript, you can use the reset() method to reset the form. This method works for all form element and form control types. Here is sample code to reset a form using JavaScript:

<form id="myForm">
  <label for="name">Name:</label>
  <input type="text" id="name" name="name"><br><br>
  <label for="age">Age:</label>
  <input type="number" id="age" name="age"><br><br>
  <input type="button" value="Reset" onclick="resetForm()">
  <input type="submit" value="Submit">
</form>

<script>
function resetForm() {
  document.getElementById("myForm").reset();
}
</script>

In this sample code, the form is reset using the resetForm() function. This function uses the getElementById() method to get the form element, and then calls the reset() method to reset it. In HTML code, this function execution can be triggered by the button's onclick event.

The effect after resetting the form

When the form is reset, all data in the form will be cleared. Unfilled form fields are reset to their default or empty values, such as the value or checked attributes of an input element. Resetting the form does not clear the selected options, and the select element's selection reverts to the default option.

It should be noted that JavaScript reset form does not refresh or reload the page. It simply restores the data in the form to default or null values ​​without affecting other parts of the page.

Summary

JavaScript is a very powerful scripting language that can be used to reset forms and clear form data. Using JavaScript to reset the form allows users to easily refill the form, eliminating the need for users to manually clear the form data every time. But it should be noted that resetting the form does not refresh the page, it just restores the form data to the default value or empty value.

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