Native js operations checkbox use document. getElementById to implement _ javascript skills

Js checkbox operation I suggest using document. getElementById (checkbox_id). checked. jquery is not recommended for checkbox operations. If you are interested, do not miss the checked attribute of jquery and checkbox.

1. After the page is loaded successfully, click to select or deselect the checkbox. The checked attribute in the checkbox attribute does not change based on whether or not the checkbox is selected.

2. The onchange or onclick method in the checkbox uses the attr method of jquery to obtain the checked. The value of the checked attribute is irrelevant to whether it is hooked.

3. Use document. getElementById ("checkbox_id"). The value obtained by checked is the same as that obtained by WYSIWYG.

4. Use $ ("# checkbox_id"). attr ("checked") to obtain Checked in 1 to, not WYSIWYG

5. $ ("# checkbox: checked") is used to obtain the checkbox on the hook.

6. document. getElementById ("checkbox_id"). checked = true. The checked attribute in the control is not displayed.

7. $ ("# checkbox_id"). attr ("checked", true), The checked attribute in the control is displayed. What you see is displayed, and the Code also changes.

Js operation checkbox I suggest using document. getElementById ("checkbox_id"). checked, jquery operation checkbox is really uncomfortable