如何在JavaScript中插入大块HTML?

时间:2013-04-29 03:24:32

标签: javascript html

如果我有一个包含许多标签的HTML块,如何在JavaScript中插入它?

var div = document.createElement('div');
div.setAttribute('class', 'post block bc2');
div.innerHTML = 'HERE TOO MUCH HTML that is much more than one line of code';
document.getElementById('posts').appendChild(div);

我该怎么做?

9 个答案:

答案 0 :(得分:33)

您可以将HTML块保存在HTML代码中的不可见容器(如<script>)中,然后在JS中运行时使用其innerHTML

例如:

var div = document.createElement('div');
div.setAttribute('class', 'someClass');
div.innerHTML = document.getElementById('blockOfStuff').innerHTML;
document.getElementById('targetElement').appendChild(div);
.red {
    color: red
}
<script id="blockOfStuff" type="text/html">
    Here's some random text.
    <h1>Including HTML markup</h1>
    And quotes too, or as one man said, "These are quotes, but
    'these' are quotes too."
</script>

<div id="targetElement" class="red"></div>

这个答案的想法:JavaScript HERE-doc or other large-quoting mechanism?


相关:

如果要在PHP中插入特别长的HTML块,可以使用Nowdoc语法,如下所示:

<?php

    $some_var = " - <b>isn't that awesome!</b>";

    echo
<<<EOT
    Here's some random text.
    <h1>Including HTML markup</h1>
    And quotes too, or as one man said, "These are quotes, but 'these' are quotes too."
    <br><br>
    The beauty of Nowdoc in PHP is that you can use variables too $some_var
    <br><br>
    Or even a value contained within an array - be it an array from a variable you've set
    yourself, or one of PHP's built-in arrays. E.g. a user's IP: {$_SERVER['REMOTE_ADDR']}
EOT;

?>

以上是您可以在浏览器中运行的上述代码的a PHP Fiddle demo

需要注意的一件重要事项: <<<EOTEOT; 必须在他们自己的行上,没有任何前面的空格。


使用Nowdoc语法比通常启动和停止PHP标记的一个巨大优势是它支持变量。考虑通常的做法(如下例所示),与Nowdoc的简单性形成对比(如上例所示)。

<?php

    // Load of PHP code here

?>

Now here's some HTML...<br><br>

Let's pretend that this HTML block is actually a couple of hundred lines long, and we
need to insert loads of variables<br><br>

Hi <?php echo $first_name; ?>!<br><br>

I can see it's your birthday on <?php echo $birthday; ?>, what are you hoping to get?

<?php

    // Another big block of PHP here

?>

And some more HTML!
</body>
</html>

答案 1 :(得分:20)

Template literals可以解决您的问题,因为它将允许编写多行字符串和字符串插值功能。您可以在字符串中使用变量或表达式(如下所示)。以读者友好的方式插入批量html很容易。

我修改了相关示例,请在下面看到。我不确定浏览器兼容Template literals的数量。请在此处阅读Template literals

var a = 1, b = 2;
var div = document.createElement('div');
div.setAttribute('class', 'post block bc2');
div.innerHTML = `
    <div class="parent">
        <div class="child">${a}</div>
        <div class="child">+</div>
        <div class="child">${b}</div>
        <div class="child">=</div>
        <div class="child">${a + b}</div>
    </div>
`;
document.getElementById('posts').appendChild(div);
.parent {
  background-color: blue;
  display: flex;
  justify-content: center;
}
.post div {
  color: white;
  font-size: 2.5em;
  padding: 20px;
}
<div id="posts"></div>

答案 2 :(得分:18)

尽管问题的性质不精确,但这是我的解释性答案。

var html = [
    '<div> A line</div>',
    '<div> Add more lines</div>',
    '<div> To the array as you need.</div>'
].join('');

var div = document.createElement('div');
    div.setAttribute('class', 'post block bc2');
    div.innerHTML = html;
    document.getElementById('posts').appendChild(div);

答案 3 :(得分:13)

如果我理解正确,您是否正在寻找多线表示,以提高可读性?你想要其他语言中的here-string。 Javascript可以接近这个:

var x =
    "<div> \
    <span> \
    <p> \
    some text \
    </p> \
    </div>";

答案 4 :(得分:1)

将每行代码添加到变量中,然后将变量写入内部HTML。见下文:

var div = document.createElement('div');
div.setAttribute('class', 'post block bc2');
var str = "First Line";
str += "Second Line";
str += "So on, all of your lines";
div.innerHTML = str;
document.getElementById('posts').appendChild(div);

答案 5 :(得分:0)

如果您在同一个域上使用,那么您可以创建一个单独的HTML文件,然后使用@Stano的答案中的代码导入它:

https://stackoverflow.com/a/34579496/2468603

答案 6 :(得分:0)

插入html块的最简单方法是使用模板字符串(反引号)。它还将允许您通过$ {...}插入动态内容:

document.getElementById("log-menu").innerHTML = `
            <a href="#"> 
               ${data.user.email}
            </a>
            <div class="dropdown-menu p-3 dropdown-menu-right">
                <div class="form-group">
                    <label for="email1">Logged in as:</label>
                    <p>${data.user.email}</p>
                </div>
                <button onClick="getLogout()" ">Sign out</button>
            </div>
    `

答案 7 :(得分:0)

只要确保像包装器一样将大代码包装到单个 DIV 中,那么它有多长就无所谓了。

HTML:

<div id='test'></div>

JS:

const arr = ['one', 'two', 'three'];

let mapped = arr.map(value=> {
  return `
    <div>
    <hr />
    <h1>${value}</h1>
    <h3>this is it</h3>
    </div>
  `
});

document.querySelector('#test').innerHTML = mapped.join(''); 

答案 8 :(得分:-1)

到目前为止,最简单的方法是使用 insertAdjacentHTML() 方法。 w3schools article