With help from https://stackoverflow.com/a/43438960
window.addEventListener('DOMContentLoaded', (event) => {
document.documentElement.addEventListener('paste', e => {
if (e.target.nodeName.toLowerCase() === 'input') {
e.preventDefault();
var text;
var clp = (e.originalEvent || e).clipboardData;
if (clp === undefined || clp === null) {
text = window.clipboardData.getData("text") || "";
if (text !== "") {
text = text.replace(/[\t\r\n\s]+/g, " ");
document.selection.createRange().pasteHTML(text);
}
} else {
text = clp.getData('text/plain') || " ";
if (text !== "") {
text = text.replace(/[\t\r\n\s]+/g, " ");
document.execCommand('insertText', false, text);
}
}
}
});
});
Note, the regex I'm calling out \t as well as \r\s and \s ... \s is any whitespace, and probably all you want/need adjust ast desired.