javascriptuncheck

When writing a Web page, you often encounter situations where you need to control the selection of text or other elements in the page. And JavaScript provides several methods to uncheck.

The first method is to control whether the element is selectable through the user-select attribute of CSS. This attribute can take a value of none, indicating that the element cannot be selected. We can change the user-select attribute value of the element through JavaScript to cancel the selection of the element. For example, the following code:

document.querySelector('#myElement').style.webkitUserSelect = 'none';

Here, the webkitUserSelect attribute value of the element with the id "myElement" is set to 'none', thereby prohibiting the element from being selected.

The second method is to unselect through the JavaScript selection object. The selection object represents the currently selected text on the page. We can unselect it through the object's removeAllRanges() method. As shown in the following code:

var selection = window.getSelection();
selection.removeAllRanges();

Here we get the currently selected text object, and then call the removeAllRanges() method to deselect it.

The third method is to control the page selection state through the ::-moz-selection pseudo-class of CSS. This pseudo-class takes effect in Firefox browser. We can achieve the deselecting effect by setting the background color and color for this pseudo-class. For example, the following code:

::-moz-selection {
  background: transparent;
  color: inherit;
}

Here::-moz-selection sets the background to transparent color and the text color to inheritance. In this way, when text is selected, the background color of the selected text will become transparent, that is, it will appear as if it is not selected.

Summary:
JavaScript provides a variety of methods to cancel the selected state on the page. We can choose to use one or more of these methods according to actual needs. The best method is to use it flexibly according to actual needs to achieve the best results.

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