我正在尝试创建一个文本字体颜色下拉按钮,该按钮为您提供了多种颜色供您选择,然后它将更改文本的颜色。我不确定如何处理这个问题,也无意使用jQuery。任何帮助,将不胜感激。在下面的代码中,它显示了其他按钮的其他示例,它们在其中更改了输入到contenteditable中的用户输入。我希望字体颜色按钮执行相同的操作,但只是更改文本的颜色
const TAB_KEY = 9;
const ENTER_KEY = 13;
const SHIFT_KEY = 16
const editor = document.querySelector('.editor');
editor.appendChild(document.createElement('li'));
editor.addEventListener('keydown', (e) => {
let code = e.keyCode || e.which;
if (code == TAB_KEY) {
e.preventDefault();
let parent = e.target;
let ul = document.createElement('ul');
let li = document.createElement('li');
ul.appendChild(li);
parent.appendChild(ul);
moveCursorToEnd(li);
} else if (code == ENTER_KEY) {
e.preventDefault();
let parent = e.target;
let li = document.createElement('li');
parent.appendChild(li);
moveCursorToEnd(li);
} else if (code == TAB_KEY * TAB_KEY){
e.preventDefault();
let parent = e.target;
let ol = document.createElement('ol');
let li = document.createElement('li');
ol.appendChild(li);
parent.appendChild(ol);
moveCursorToEnd(li);
}
});
function moveCursorToEnd(el) {
el.focus();
document.execCommand('selectAll', false, null);
document.getSelection().collapseToEnd();
}
/*editor.addEventListener('click', (x) => {
x = document.getElementById("b");
if(x.style.fontWeight == "bolder"){
x.style.fontWeight = "normal";
} else {
x.style.fontWeight = "bolder";
}
});*/
function bold(){
if(document.execCommand("bold")){
document.execCommand("normal");
}else{
document.execCommand("bold");
}
}
/*function underline(){
let x = document.getElementById("text");
if(x.style.textDecoration == "underline"){
x.style.textDecoration = "none";
}else{
x.style.textDecoration = "underline";
}
}*/
function underline(){
if(document.execCommand("underline")){
document.execCommand("none");
}else{
document.execCommand("underline");
}
}
/*Turns the font of the text to Italic*/
function italic(){
if(document.execCommand("italic")){
document.execCommand("normal");
}else{
document.execCommand("italic");
}
}
function highlighSelectedText(){
let sel = window.getSelection().getRangeAt(0);
let selText = sel.extractContents();
let span = document.createElement("span");
span.style.backgroundColor = "yellow";
span.appendChild(selText);
sel.insertNode(span);
}
/*function printPage(){
let printButton = document.getElementById("ul");
printButton.style.visibility = 'hidden';
window.print();
printButton.style.visibility = 'visible';
}*/
body{
margin-top:1em;
margin-bottom: 10em;
margin-right: 1em;
margin-left: 1em;
border: solid;
border-color: #0033cc;
background-color: #f6f6f6;
}
div button{
padding: 1em 2em;
color: white;
background-color: #0000cc;
}
div input{
padding: 1em 2em;
color: white;
background-color: #0000cc;
}
div{
list-style-type:square;
list-style-position: inside;
margin-left: 0.25em;
margin-bottom: 5em;
}
section {
padding: 1em 2em;
color: white;
background-color: #0000cc;
}
.editor {
font-weight: normal;
}
div contenteditable{
margin-bottom: 10em;
}
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<head>
<title>Outliner</title>
<link href="style.css" rel="stylesheet" title="Style">
<div>
<button id="b" onclick="bold()"> B </button>
<button onclick="underline()"> U </button>
<button onclick="italic()"> I </button>
<input type="button" onclick="highlighSelectedText()" value="Highlight"/>
<div id="text" class="editor" contenteditable="true" draggable="true"></div>
</div>
<section>
<input id="saveAs"></input>
<button onclick="saveTextFile()">Download</button>
<input type="file" id="load"/>
<button onclick="loadFile()">Load</button>
</section>
<section>
<button class="btn btn-primary" onclick="saveChanges()">Save Text</button>
<button class="btn btn-warning" onclick="clearStorage()">Reset</button>
</section>
</head>
<script type= "text/javascript" src='setting.js'></script>
</body>
答案 0 :(得分:2)
首先,我们将使用CSS
变量。让我们在:root
:root {
--font-color: #000;
}
现在,我们将使用该值来设置P
标签的字体颜色。
p {
color: var(--font-color);
}
现在,当有人单击一种颜色名称时,我们要更改--font-color
的值。 (请注意,我们也使用data-
属性模型来存储我们想要更改的颜色)。
document.documentElement.style.setProperty('--font-color', target.dataset.color);
而且,我们现在可以轻松更改颜色。这也适用于其他值。 这是一个很棒的article
document.addEventListener('click', ({ target }) => {
if(target.matches('p')) {
document.documentElement.style.setProperty('--font-color', target.dataset.color);
}
});
:root {
--font-color: #000;
}
p {
width: 30%;
border: 2px solid #00000030;
border-radius: 7px;
margin: 0.25rem;
padding: 0.25rem;
color: var(--font-color);
}
<h2>Click a color</h2>
<p data-color="#f00">Red</p>
<p data-color="#0f0">Green</p>
<p data-color="#00f">Blue</p>
<p data-color="#000">Reset</p>
答案 1 :(得分:0)
您可以操纵样式变量:
<div id="text">
Choose a color
</div>
<input id="color" type="color">
<button onclick="document.getElementById('text').style.color = document.getElementById('color').value;">Change Color</button>