按下CTRL-C和CTRL-V时更改文本的颜色 [英] Change colour of text when CTRL-C and CTRL-V are pressed
本文介绍了按下CTRL-C和CTRL-V时更改文本的颜色的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在单击CTRL-C和CTRL-V时更改html文本的文本.我有这段代码可以在单击CTRL-C时更改文本,但是当我复制其他文本时,以前的文本不会更改回其原始颜色.我该如何实现?
I want change text of html text when CTRL-C and CTRL-V are clicked. I have this code that changes the text when CTRL-C is clicked but when I copy other text, the previous text doesn't change back to its original colour. How can I achieve this?
$(document).ready(function() {
var ctrlDown = false,
ctrlKey = 17,
cmdKey = 91,
vKey = 86,
cKey = 67;
$(document).keydown(function(e) {
if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = true;
}).keyup(function(e) {
if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = false;
});
// Document Ctrl + C/V
$(document).keydown(function(e) {
var clip = document.getElementById("clipBoard");
if (ctrlDown && (e.keyCode == cKey)) {
navigator.clipboard.readText()
.then(text => {
clip.value = text;
var sel = window.getSelection();
var range = 0;
if (sel.rangeCount && sel.getRangeAt) {
range = sel.getRangeAt(0);
}
// Set design mode to on
document.designMode = "on";
if (range) {
sel.removeAllRanges();
sel.addRange(range);
}
// Colorize text
document.execCommand("ForeColor", false, "red");
// Set design mode to off
document.designMode = "off";
})
.catch(err => {
});
console.log("Document catch Ctrl+C");
}
if (ctrlDown && (e.keyCode == vKey)) {
console.log("Document catch Ctrl+V");
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>Enter text here and copy</p>
<span id="content" contenteditable>Test words to copy and paste</span>
<br>
<br>
<p>This is the text in the clipboard</p>
<textarea id="clipBoard" readonly></textarea>
这是代码的 jsfiddle .它仅在Chrome(剪贴板权限)中可用
Here is the jsfiddle of the code. It will only work in Chrome (clipboard permissions)
谢谢!
推荐答案
您可以选择在每次应用新颜色之前重置颜色.参见下面的代码段:
You can opt to reset the color, each time before applying the new color. See snippet below:
$(document).ready(function() {
var ctrlDown = false,
ctrlKey = 17,
cmdKey = 91,
vKey = 86,
cKey = 67;
$(document).keydown(function(e) {
if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = true;
}).keyup(function(e) {
if (e.keyCode == ctrlKey || e.keyCode == cmdKey) ctrlDown = false;
});
// Document Ctrl + C/V
$(document).keydown(function(e) {
var clip = document.getElementById("clipBoard");
if (ctrlDown && (e.keyCode == cKey)) {
navigator.clipboard.readText()
.then(text => {
clip.value = text;
var sel = window.getSelection();
var range = 0;
if (sel.rangeCount && sel.getRangeAt) {
range = sel.getRangeAt(0);
}
// Set design mode to on
document.designMode = "on";
if (range) {
sel.removeAllRanges();
sel.addRange(range);
}
//reset all custom color edits
$('font').removeAttr('color');
// Colorize text
document.execCommand("ForeColor", false, "red");
// Set design mode to off
document.designMode = "off";
})
.catch(err => {
});
console.log("Document catch Ctrl+C");
}
if (ctrlDown && (e.keyCode == vKey)) {
console.log("Document catch Ctrl+V");
}
});
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<p>Enter text here and copy</p>
<span id="content" contenteditable>Test words to copy and paste</span>
<br>
<br>
<p>This is the text in the clipboard</p>
<textarea id="clipBoard" readonly></textarea>
注意:仅测试了Chrome 78
Note: Tested only Chrome 78
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