javascript disable touch

JavaScript No Touch

With the popularity of mobile devices, more and more websites and applications are beginning to focus on the mobile experience. In this case, touch screen technology is widely used. However, in some cases, we need to disable touch to ensure the proper functioning of the website or application. This article explains how to disable touch using JavaScript.

What is touch?

On mobile devices, we usually touch the screen with our fingers to operate. This method is called touch. Touch comes in many forms, including single-finger taps, swipes, pinches, and more. In web development, we can use CSS and JavaScript to handle touch events.

Why should you disable touch?

In some cases, we need to disable touch to ensure the proper functioning of the website or application. Here are some common situations:

1. Element interaction conflicts

When there are multiple interactable elements (such as buttons, links, galleries, etc.) on a page, they Conflicts may occur. For example, a user might accidentally press a button instead of intending to click on another link. In this case we need to disable touch to avoid this situation.

2. Avoid misoperation

Users may accidentally touch some sensitive areas, such as the delete button, setting button, etc. To avoid this misoperation, we need to disable touch.

3. Improving performance

In some cases, disabling touch can improve performance. For example, when we have a very large gallery or table, swiping can cause the page to stutter or crash. In this case, disabling touch can help us make the page more responsive.

How to disable touch?

In JavaScript, we can disable touch using the following methods:

1. Using CSS

We can disable touch using the touch-action property of CSS . This attribute has the following options:

• auto: The browser can handle touch events freely.
• none: The browser does not handle touch events.
• pan-x: Allow horizontal movement.
• pan-y: Allow vertical movement.
• manipulation: Support for zooming and panning with two-finger touch.

The following code can disable touch events for the entire page:

body {
    touch-action: none;
}

If you only want to disable touch events for a certain element, you can do the following:

.el {
    touch-action: none;
}

2. Using JavaScript

If we need more control, we can use JavaScript to disable touch. The following code can disable touch events for the entire page:

document.addEventListener('touchstart', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });
document.addEventListener('touchmove', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });
document.addEventListener('touchend', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });

If you only want to disable touch events for a certain element, you can do as follows:

var el = document.getElementById('el');
el.addEventListener('touchstart', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });
el.addEventListener('touchmove', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });
el.addEventListener('touchend', function(e) {
    e.preventDefault();  // 阻止默认事件
}, { passive: false });

In the above code, we use preventDefault() method to prevent the default behavior of touch events, thereby disabling touch.

Note that we pass { passive: false } as an option to the event listener to ensure that the preventDefault() method takes effect. If this option is not set, the preventDefault() method may not work, preventing touch from being disabled.

Summary

This article explains how to disable touch using JavaScript. We can disable touch using CSS or JavaScript, depending on our needs. Either way, every touch-disabling scenario should be carefully considered to ensure the proper functioning of the website or application.

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