css JS:当我打开html文件时,文本不会自动着色,启动函数时出现问题

tpxzln5u  于 5个月前  发布在  其他
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我有问题的JavaScript脚本颜色的文本.它工作正常,但文本只有颜色,如果你点击面板上,并按下“空间”按钮在PC键盘上.如果你按任何其他键(甚至回车),文本不着色.


的数据
我想该脚本自动激活,只要我打开的html文件,使文本自动着色,只要我打开文件。
在html中,我尝试同时使用onchangeoninput函数。而在js文件中,我在创建changeColor()函数后调用它,目的是在打开文件时自动执行它,但它不起作用。抱歉的问题,但我是新来的。我如何解决它?

index.html

<div id="editor" contenteditable="true" oninput="showPreview();" onchange="changeColor();">&lt;h1>This is a Heading&lt;/h1>
    &lt;p>This is a paragraph.&lt;/p>
  </div>
    
    <h3>PREVIEW</h3>
    <div class="preview-area">
      <iframe id="preview-window"></iframe>
    </div>

字符串

style.css

#editor {
  width: 400px;
  height: 100px;
  padding: 10px;
  background-color: #444;
  color: white;
  font-size: 14px;
  font-family: monospace;
  white-space: pre;
}
.statement {
  color: orange;
}

JavaScript.js

// CHANGE COLOR TEXT
function changeColor() {

var keywords = ["DIV", "DIV", "H1", "H1", "P", "P", "HELLO", "<", ">", "/"];
// Keyup event
document.querySelector("#editor").addEventListener("keyup", (e) => {
    // Space key pressed
    if (e.keyCode == 32) {
    var newHTML = "";
    // Loop through words
    str = e.target.innerText;
    (chunks = str
        .split(new RegExp(keywords.map((w) => `(${w})`).join("|"), "i"))
        .filter(Boolean)),
        (markup = chunks.reduce((acc, chunk) => {
        acc += keywords.includes(chunk.toUpperCase())
            ? `<span class="statement">${chunk}</span>`
            : `<span class='other'>${chunk}</span>`;
        return acc;
        }, ""));
    e.target.innerHTML = markup;

    // Set cursor postion to end of text
    //    document.querySelector('#editor').focus()
    var child = e.target.children;
    var range = document.createRange();
    var sel = window.getSelection();
    range.setStart(child[child.length - 1], 1);
    range.collapse(true);
    sel.removeAllRanges();
    sel.addRange(range);
    this.focus();
    }
})
}
    
changeColor()

//PREVIEW
function showPreview() {
    var editor = document.getElementById("editor").innerText;
  
    // var cssCode =
    //  "<style>" + document.getElementById("cssCode").value + "</style>";
    // var jsCode =
    //  "<scri" + "pt>" + document.getElementById("jsCode").value + "</scri" + "pt>";
    
    var frame = document.getElementById("preview-window").contentWindow.document;
    document.getElementById("preview-window").srcdoc = editor;
    frame.open();
    //frame.write(htmlCode + cssCode + jsCode);
    frame.write(editor);
    frame.close();
  }
  
  showPreview()

gopyfrb3

gopyfrb31#

您可以考虑将changeColor()的着色部分重构为另一个函数,并在初始加载时立即在JavaScript中调用它:

function applyColoring(element) {
  var keywords = ["DIV", "DIV", "H1", "H1", "P", "P", "HELLO", "<", ">", "/"];

  var newHTML = "";
  // Loop through words
  str = element.innerText;
  (chunks = str
    .split(new RegExp(keywords.map((w) => `(${w})`).join("|"), "i"))
    .filter(Boolean)),
    (markup = chunks.reduce((acc, chunk) => {
      acc += keywords.includes(chunk.toUpperCase())
        ? `<span class="statement">${chunk}</span>`
        : `<span class='other'>${chunk}</span>`;
      return acc;
    }, ""));
  element.innerHTML = markup;
}

// CHANGE COLOR TEXT
function changeColor() {
  // Keyup event
  document.querySelector("#editor").addEventListener("keyup", (e) => {
    // Space key pressed
    if (e.keyCode == 32) {
      applyColoring(e.target);

      // Set cursor postion to end of text
      //    document.querySelector('#editor').focus()
      var child = e.target.children;
      var range = document.createRange();
      var sel = window.getSelection();
      range.setStart(child[child.length - 1], 1);
      range.collapse(true);
      sel.removeAllRanges();
      sel.addRange(range);
      this.focus();
    }
  });
}

changeColor();
applyColoring(document.getElementById('editor'));

//PREVIEW
function showPreview() {
  var editor = document.getElementById("editor").innerText;

  // var cssCode =
  //  "<style>" + document.getElementById("cssCode").value + "</style>";
  // var jsCode =
  //  "<scri" + "pt>" + document.getElementById("jsCode").value + "</scri" + "pt>";

  var frame = document.getElementById("preview-window").contentWindow.document;
  document.getElementById("preview-window").srcdoc = editor;
  frame.open();
  //frame.write(htmlCode + cssCode + jsCode);
  frame.write(editor);
  frame.close();
}

showPreview();
#editor {
  width: 400px;
  height: 100px;
  padding: 10px;
  background-color: #444;
  color: white;
  font-size: 14px;
  font-family: monospace;
  white-space: pre;
}
.statement {
  color: orange;
}
<div
  id="editor"
  contenteditable="true"
  oninput="showPreview();"
  onchange="changeColor();"
>&lt;h1>This is a Heading&lt;/h1>
  &lt;p>This is a paragraph.&lt;/p></div>

<h3>PREVIEW</h3>
<div class="preview-area">
  <iframe id="preview-window"></iframe>
</div>

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