Full selection and inverse selection implemented by jquery

With the continuous improvement of website functions, the application of check boxes is becoming more and more widespread. When there are a large number of check boxes, a function of selecting all or inverting the selection will be very convenient for users to operate. The JQuery library provides the corresponding API to easily implement this function.

1. Implementation of the Select All function

The Select All function refers to a user operation that allows you to select all check boxes and switch their selected state to the selected state. The code for jQuery to implement all selection is as follows:

 $("#checkAll").click(function () {
        $('input[type="checkbox"]').prop('checked', this.checked);
 });

In the above code, the $ symbol represents the selection of an element. When clicking the element with the id of checkAll, the check status is set for all elements whose input type is checkbox. Selected, that is, this.checked state.

2. Implementation of the anti-selection function

The anti-selection function means that the user can select all unchecked check boxes, and the selected check boxes will become unchecked. The jQuery code for reverse selection is as follows:

 $("#reverseSelect").click(function () {
        $('input[type="checkbox"]').each(function () {
            this.checked = !this.checked;
        });
 });

In the above code, the $ symbol selects the element with the id of reverseSelect. When clicked, it traverses each element with the input type checkbox and inverts its check status. If it was originally selected, it becomes unselected; otherwise, it becomes selected.

3. Implementation of comprehensive functions of selecting all and inverting selection

If you need to realize both the functions of selecting all and inverting selection at the same time, you can modify the code to achieve the following:

$("#checkAll").click(function () {
        $('input[type="checkbox"]').prop('checked', this.checked);
 });
$("#reverseSelect").click(function () {
        $('input[type="checkbox"]').each(function () {
            this.checked = !this.checked;
        });
 });

Above In the code, two functions are bound to the buttons with id checkAll and reverseSelect respectively. These two buttons correspond to the functions of selecting all and inverting selection respectively.

In general, the select all and invert selection functions provided by jQuery can greatly improve the convenience of user operations. This implementation is simple, easy to use, and can be applied to various types of websites.

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