正文
用纯js实现一个文本编辑器
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效果图
代码
<!DOCTYPE html>
<html lang="en"><head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.editButtons span{
display:inline-block;
white-space:nowrap;
}
[data-edit] {
float:left;
border:0;
font: 12px/1 monospace;
background:#ddd;
padding:4px 8px;
}
[contenteditable] {
padding:4px 16px;
background:#eee;
}
</style>
</head><body>
<div class="editButtons"> <span title="STYLES">
<!-- 加粗 -->
<button data-edit="bold"><b>B</b></button>
<!-- 斜体 -->
<button data-edit="italic"><i>I</i></button>
<!-- 下划线 -->
<button data-edit="underline"><u>U</u></button>
<!-- 中划线 -->
<button data-edit="strikeThrough"><s>S</s></button>
</span> <span title="TEXT FORMAT">
<!-- 字体标签设置 -->
<button data-edit="formatBlock:p">P</button>
<button data-edit="formatBlock:H1">H1</button>
<button data-edit="formatBlock:H2">H2</button>
<button data-edit="formatBlock:H3">H3</button>
</span> <span title="FONT SIZE">
<!-- 字体大小设置 -->
<button data-edit="fontSize:1">s</button>
<button data-edit="fontSize:3">M</button>
<button data-edit="fontSize:5">L</button>
</span> <span title="LISTS">
<!-- 列表格式设置 -->
<button data-edit="insertUnorderedList">UL</button>
<button data-edit="insertOrderedList">OL</button>
</span> <span title="ALIGNMENT">
<!-- 文本对齐设置 -->
<button data-edit="justifyLeft">⇤</button>
<button data-edit="justifyCenter">↔</button>
<button data-edit="justifyRight">⇥</button>
</span> <span title="CLEAR FORMATTING">
<!-- 清除文本 -->
<button data-edit="removeFormat">×</button>
</span> <span title="COPY">
<!-- 复制选中文本 -->
<button data-edit="copy">C</button>
</span>
</div> <div contenteditable id="textbox">
<p>文本编辑器</p>
</div></body>
<script>
document.querySelectorAll("[data-edit]").forEach(btn =>
btn.addEventListener("click", function (ev) {
ev.preventDefault();
console.log(this.getAttribute("data-edit"))
const cmd_val = this.getAttribute("data-edit").split(":");
if(cmd_val[0] == 'copy'){ // 复制选中的文本
document.execCommand(cmd_val[0]);
}else{
document.execCommand(cmd_val[0], false, cmd_val[1]);
} })
);</script></html>
