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enable-text-selection.js
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enable-text-selection.js
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/**
* Adds CSS rules to undo user-select:none. Also cycles through every child of <body> and binds events associated
* with text selection to a benign function. Finally, remove 'disabled' attributes from all text inputs and
* ensures that keydown and keyup events are allowed (to defeat blocks that prevent cut,copy, paste using shortcuts
* There is one concern though: binding to so many events will undoubtedly break functionality on some pages. For
* instance, text inputs very often have custom events bound to keypresses (eg to run a search and show results as
* the user types). As a result, this script is probably not fit to run indiscriminately on all pages; it should
* rather be used only when the user needs to defeat text-selection blocks on specific pages.
*
* Crunch at https://alanhogan.github.io/bookmarkleter/
*/
function allowTextSelection() {
window.console && console.log("allowTextSelection");
//add styles that enable text selection
var style = document.createElement("style");
style.type = "text/css";
style.innerHTML = `*, p, div {
user-select: text !important;
-moz-user-select: text !important;
-webkit-user-select:text !important;}
`;
document.head.appendChild(style);
//Put all of <body> children in a collection
//Use getElementsByTagName because it has better compatibility (it's older) than querySelectorAll('*')
var elArray = document.body.getElementsByTagName("*");
//allow mouse events typically involved in selection
for (var i = 0; i < elArray.length; i++) {
var el = elArray[i];
el.onselectstart = el.ondragstart = el.ondrag = el.oncontextmenu = el.onmousedown = el.onmouseup = function() {
return true;
};
//special processing for text-style <input> elements
if (
el instanceof HTMLInputElement &&
["text", "password", "email", "number", "tel", "url"].indexOf(
el.type.toLowerCase()
) > -1
) {
//enable text inputs (to defeat an easy way to block selection by setting input's 'disabled' attribute)
el.removeAttribute("disabled");
//counteract any listener that would block copy&paste keyboard shortcuts. (I can't figure out yet why
// although this works on the first text input in text-selection-demo.html, it doesn't work on the 2nd
el.onkeydown = el.onkeyup = function() {
return true;
};
}
}
}
allowTextSelection();