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33 lines
834 B
JavaScript
33 lines
834 B
JavaScript
"use strict";
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function findIdRoot(element) {
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let current = element;
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while (current != null) {
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if (current.id != null && current.id !== "") {
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return current;
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} else {
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current = current.parentElement;
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}
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}
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}
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module.exports = function generateSelector(element) {
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/* FIXME: check that element != null */
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let root = findIdRoot(element);
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if (root === element) {
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/* Special case: always identify by the ID alone, never suffix anything else, when the selected element *itself* has an ID. */
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return `#${element.id}`;
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} else {
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let segments = [
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(root != null) ? `#${root.id}` : null,
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(element.classList.length > 0)
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? Array.from(element.classList).map((className) => `.${className}`).join("")
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: element.tagName.toLowerCase()
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].filter((segment) => segment != null);
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return segments.join(" ");
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}
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};
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