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javascript getElementById() method

Chinese translationRecent Updates：2019-02-13 13:33:11

get

英[get] 美[ɡɛt]

vt.Get; catch; persuade; receive (punishment, etc.)

vt.& vi.arrive, come

vi.become;begin;try to deal with;obtain benefits or wealth

n.Reproduction, cubs; profit

Third person singular: gets Present participle: getting Past tense: got Past participle: got gotten

element

英[ˈelɪmənt] US[ˈɛləmənt]

n.Element; [chemical] element; principle; [electricity] resistance wire

Plural: elements

by

英[baɪ] 美[baɪ]

prep.beside...; means of expression; due to; Pass

adv.pass; indicates reservation or saving; use; short visit

id

##英[ ɪd]

n.

ID card; genetic quality; instinctive impulse; identifier

javascript getElementById() method Video explanation

javascript getElementById() method syntax

Function: Returns a reference to the first object with the specified ID.

Syntax: document.getElementById(id)

Description: HTML DOM defines multiple methods for finding elements, except getElementById (), there are also getElementsByName() and getElementsByTagName(). However, if you need to find a specific element in the document, the most efficient method is getElementById(). When manipulating a specific element of the document, it is best to give the element an id attribute, giving it a unique name (in the document), and then you can use that ID to find the desired element.

javascript getElementById() method example

<html>
<head>
    <meta charset="UTF-8">
    <script type="text/javascript">
        function getValue()
        {
            var x=document.getElementById("myHeader")
            alert(x.innerHTML)
        }
    </script>
</head>
<body>

<h1 id="myHeader" onclick="getValue()">这是标题</h1>
<p>点击标题，会提示出它的值。</p>

</body>
</html>

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