Introduction to jQuery html() and other methods_jquery

To get the value of a certain element, such as an input box, we often use $('#test').val();

$('#test') I won’t say more about this, anyway Just get the element with ID test.

$('#test').val(), that is, to get its value. Generally speaking, any element that can be used in FORM can use .val() to get the value. , such as input, textarea, select, etc., you can use .val() to get their current value

and .val('aa'); is to set the value of the element, $('#test ').val('aa'), which is equivalent to setting the value of the test element to aa.

There are two other usages like this: .html(), .text(). These two usages are often used on div and span elements. Generally, they are assigned and obtained values ​​for these two elements. .

.html() replaces the previous .innerHTML, .html('test'), and replaces .innerHTML = 'test';

These similar simplified writing methods allow us to It feels smoother in actual operation.

These methods all assign and obtain values ​​by adding parameters directly to the method name. There are also some values ​​that are obtained through the second parameter (not clear...), such as $('#test').attr('name'), then the returned value is in its attribute name. If $('#test').attr('id','test2'), it is equivalent to setting the name of the test element to test2. When the value is retrieved, the name will be test2.

That’s too confusing. . . .