<!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>原生JS实现简单富文本编辑器</title>
</head>
<body>
<center>
<h2 style="margin:auto;">原生JS实现简单富文本编辑器</h2>
</center>
<hr>
<div id="toolbar"
style="700px;margin:auto;border:2px solid gray;padding: 5px;overflow: auto;font-family: 'Courier New', Courier, monospace;">
<input type="button" name="bold" value='加粗' class="bold">
<input type="button" name="italic" value='斜体' class="italic">
<input type="button" name="underline" value='下划线' class="decotation">
大小
<select name="fontSize" class="font">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
</select>
<!-- 图片
<select name="insertImage">
<option value="">请选择图片</option>
<option value="timg.jpg">timg.jpg</option>
<option value="timg1.jpg">timg1.jpg</option>
<option value="timg2.jpg">timg2.jpg</option>
<option value="timg3.jpg">timg3.jpg</option>
<option value="timg4.jpg">timg4.jpg</option>
</select> -->
<input type="button" name="insertImage" value='插入图片(未完成,可粘贴)' class="insImg">
<input type="button" name="selectAll" value='全选' class="selectAll">
<input type="button" name="undo" value='撤销' class="undo">
<input type="button" name="justifyLeft" value='居左' class="justifyLeft">
<input type="button" name="justifyCenter" value='居中' class="justifyCenter">
<input type="button" name="justifyRight" value='居右' class="justifyRight">
</div>
<div id="edit" style="700px;height:500px;margin:auto;border:2px solid gray;padding: 5px;overflow: auto;"
contenteditable="true">
</div>
<button id="save" style="300px;height:30px;margin:auto;margin-top:30px;
background-color: green;border:1px solid green;display: block;color: white;font-family:'Courier New', Courier, monospace;
font-weight: 500;font-size: 20px;">点 击</button>
<div id="shade" style="100%;height:100%;background-color: white;
opacity:0.5;position: absolute;z-index:5;display: none;left:0;top:0;"></div>
<script>
(function () {
// 富文本编辑器类
class Editor {
constructor() {
this.bindElem();
}
bindElem() {
var toolbar = document.getElementById("toolbar");
var bs = toolbar.querySelectorAll('input,select');
for (var i = 0; i < bs.length; i++) {
if (bs[i].tagName.toLowerCase() == 'select') {
bs[i].onchange = function () {
document.execCommand(this.name, true, this.value);
}
} else if (bs[i].tagName.toLowerCase() == 'input') {
this.action(bs[i], bs[i].name);
}
}
}
action(obj, attr) {
obj.onclick = function () {
document.execCommand(attr, true);
}
}
}
new Editor();
})();
// 监听粘贴事件
document.querySelector('#edit').addEventListener('paste', function (e) {
// 判断剪切板是否有内容
if (!(e.clipboardData && e.clipboardData.items)) {
return;
}
for (var i = 0, len = e.clipboardData.items.length; i < len; i++) {
var item = e.clipboardData.items[i];
if (item.kind == "file") {
var blob = item.getAsFile();
var reader = new FileReader();
var imgs = new Image();
imgs.file = blob;
reader.onload = (function (aImg) {
return function (e) {
aImg.src = e.target.result;
}
})(imgs)
reader.readAsDataURL(blob);
document.querySelector('#edit').appendChild(imgs);
}
}
});
document.getElementById("save").onclick = function () {
alert(document.getElementById("edit").innerHTML);
}
document.querySelector('.insImg').onclick = function(){
document.getElementById("shade").style.display = "block";
var div = document.createElement("div");
div.style.cssText=
"300px;height:50px;border:1px solid #000;background-color:white;" +
"text-align:center;line-height:50px;" +
"position:absolute;z-index:9;left:0; top:0;right:0;bottom:0;margin:auto;";
var input = document.createElement("input");
input.type = "file";
div.appendChild(input);
document.body.appendChild(div);
}
</script>
</body>
</html>
