dom manipulation util
Этот скрипт недоступен для установки пользователем. Он является библиотекой, которая подключается к другим скриптам мета-ключом // @require https://update.greasyfork.org/scripts/499616/1635544/dom%20util.js
const HtmlSanitizer = {
tempElement: document.createElement("div"),
sanitize: function (/** @type {string} */ htmlString) {
this.tempElement.innerText = htmlString;
return this.tempElement.innerHTML;
},
};
// Feature detection for Trusted Types
let trustedHTMLPolicy;
if (window.trustedTypes && window.trustedTypes.createPolicy) {
trustedHTMLPolicy = window.trustedTypes.createPolicy('mmHtmlPolicy', {
createHTML: (input) => input // Add sanitization logic here if necessary
});
}
class HtmlString extends String {
/**@type {HTMLElement|null} */
element = null;
/**@param {string} value */
constructor(value) {
super(value);
}
/**@returns {HTMLElement} */
asElement() {
if (this.element !== null) {
return this.element;
}
const temp = document.createElement("div");
// Use Trusted Types if available, otherwise fall back to direct assignment
if (trustedHTMLPolicy) {
temp.innerHTML = trustedHTMLPolicy.createHTML(this.valueOf());
} else {
temp.innerHTML = this.valueOf();
}
if (temp.childElementCount > 1) {
throw new Error("html template does not accept more than 1 element");
}
this.element = /**@type {HTMLElement} */ (temp.firstElementChild);
return /**@type {HTMLElement} */ (this.element);
}
}
/**
* @param {string} selector
* @param {HTMLElement|Document} rootElement
* @returns {HTMLElement|null}
*/
function $findElm(selector, rootElement = document) {
return /**@type {HTMLElement|null} */ (rootElement.querySelector(selector));
}
/**
* @param {string} selector
* @param {HTMLElement|Document} rootElement
* @returns {HTMLElement}
*/
function $findElmStrictly(selector, rootElement = document) {
const element = /**@type {HTMLElement|null} */ (rootElement.querySelector(selector));
if (element === null) {
throw new Error(`Element with selector '${selector}' not found`);
}
return element;
}
/**
* @param {string} selector
* @returns {NodeListOf<HTMLElement>}
*/
function $findAll(selector) {
return /**@type {NodeListOf<HTMLElement>} */ (document.querySelectorAll(selector));
}
/**@typedef {string|HtmlString|number|boolean} TInterpolatedValue */
/**
* safe html interpolation
* @param {TemplateStringsArray} literalValues
* @param {TInterpolatedValue[]|TInterpolatedValue[][]} interpolatedValues
* @returns {HtmlString}
*/
function html(literalValues, ...interpolatedValues) {
let result = "";
interpolatedValues.forEach((currentInterpolatedVal, idx) => {
let literalVal = literalValues[idx];
let interpolatedVal = "";
if (Array.isArray(currentInterpolatedVal)) {
interpolatedVal = currentInterpolatedVal.join("\n");
} else if (typeof currentInterpolatedVal !== "boolean") {
interpolatedVal = currentInterpolatedVal.toString();
}
const isSanitize = !literalVal.endsWith("$");
if (isSanitize) {
result += literalVal;
result += HtmlSanitizer.sanitize(interpolatedVal);
} else {
literalVal = literalVal.slice(0, -1);
result += literalVal;
result += interpolatedVal;
}
});
result += literalValues.slice(-1);
return new HtmlString(result);
}
/**
* wait for element to be added to the DOM
* @param {string} selector
* @param {number} timeout
* @param {(element: HTMLElement) => void} callback
* @returns {CallableFunction | null} callback to stop observing
*/
function waitForElement(selector, timeout, callback) {
let matchingElement = /**@type {HTMLElement|null} */ (document.querySelector(selector));
if (matchingElement) {
callback(matchingElement);
return null;
}
const observer = new MutationObserver((mutations) => {
for (let mutation of mutations) {
if (!mutation.addedNodes) continue;
for (let node of mutation.addedNodes) {
if (node.matches && node.matches(selector)) {
callback(node);
observer.disconnect();
clearTimeout(timeoutId);
return;
}
if (node.querySelector) {
matchingElement = /**@type {HTMLElement|null} */ (node.querySelector(selector));
if (matchingElement !== null) {
callback(matchingElement);
observer.disconnect();
clearTimeout(timeoutId);
return;
}
}
}
}
});
observer.observe(document.documentElement, {
childList: true,
subtree: true,
attributes: false,
characterData: false,
});
const timeoutId = setTimeout(() => {
observer.disconnect();
console.log(`Timeout reached: Element "${selector}" not found`);
}, timeout);
return () => {
observer.disconnect();
};
}
/**
* Smoothly scrolls the page to the given element with an optional offset above it.
*
* @param {HTMLElement} el - The target element to scroll to.
* @param {number} [offset=20] - The number of pixels to offset above the element.
* @returns {void}
*/
function scrollToElementWithOffset(el, offset = 20) {
const rect = el.getBoundingClientRect();
const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
const targetY = rect.top + scrollTop - offset;
window.scrollTo({
top: targetY,
behavior: 'smooth'
});
}
/**
* Appends a <style> tag with class 'mm-styles' and the given CSS rules to the document head.
*
* @param {string} cssText - The CSS rules to insert into the style tag.
* @returns {HTMLStyleElement} The created style element.
*/
function addStyles(cssText) {
const styleEl = document.createElement('style');
styleEl.className = 'mm-styles';
styleEl.textContent = cssText;
document.head.appendChild(styleEl);
return styleEl;
}