gpt4 book ai didi

javascript - execCommand h1 样式仅选定文本

转载 作者:行者123 更新时间:2023-12-02 22:45:40 34 4
gpt4 key购买 nike

我正在研究带有突出显示选项的自定义文本区域。现在添加了 h1-h4 和粗体选项。

问题:

当我选择文本并单击 Heading1 按钮时,它会设置整行而不是选定文本的样式。当我单击“粗体”按钮时,它仅设置所选文本的样式。

我只想对选定的文本而不是整行应用 h1-h4 样式。

这是我的代码:

<!DOCTYPE html>
<html lang="en">

<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>

<body>

<div class="container">
<h2>Comment</h2>
<div class="panel panel-default">
<div class="panel-heading">
<button data-command="h1" class="btn btn-default btn-sm">Heading1</button>
<button data-command="h2" class="btn btn-default btn-sm">Heading2</button>
<button data-command="h3" class="btn btn-default btn-sm">Heading3</button>
<button data-command="h4" class="btn btn-default btn-sm">Heading4</button>
<button data-command="bold" class="btn btn-default btn-sm">Bold</button>
</div>
<div class="panel-body" contenteditable>Sample comment</div>
</div>
</div>

</body>
<script>
$(function() {
$(".btn").click(function() {
var command = $(this).data("command");
if (command == 'h1' || command == 'h2' || command == 'h3' || command == 'h4')
document.execCommand('formatBlock', false, '<' + command + '>');
else
document.execCommand(command);
})
})
</script>

</html>

最佳答案

我喜欢你的问题。我不知道这个API。但下次请使用 ES6(现在到处都是)和 block 表达式的括号。

来自文档

Adds an HTML block-level element around the line containing the current selection, replacing the block element containing the line if one exists (in Firefox, is the exception — it will wrap any containing block element). Requires a tag-name string as a value argument. Virtually all block-level elements can be used.

但是您可以使用insertHTML命令。

<!DOCTYPE html />
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link
rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css"
/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/js/bootstrap.min.js"></script>
</head>

<body>
<div class="container">
<h2>Comment</h2>
<div class="panel panel-default">
<div class="panel-heading">
<button data-command="h1" class="btn btn-default btn-sm">
Heading1
</button>
<button data-command="h2" class="btn btn-default btn-sm">
Heading2
</button>
<button data-command="h3" class="btn btn-default btn-sm">
Heading3
</button>
<button data-command="h4" class="btn btn-default btn-sm">
Heading4
</button>
<button data-command="bold" class="btn btn-default btn-sm">
Bold
</button>
</div>
<div class="panel-body" contenteditable>Sample comment</div>
</div>
</div>
</body>
<script>
$(function() {
$(".btn").click(function() {
var command = $(this).data("command");
if (
command == "h1" ||
command == "h2" ||
command == "h3" ||
command == "h4"
) {
const selection = window.getSelection();
document.execCommand(
"insertHTML",
false,
`<${command}>${selection}</${command}>`
);
} else {
document.execCommand(command);
}
});
});
</script>
</html>

另外,不要忘记序列化您的内容。

关于javascript - execCommand h1 样式仅选定文本,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58411141/

34 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com