vanillajs-browser-helpers/find.mjs

Collection of convenience code snippets (helpers) that aims to make it a little easier to work with vanilla JS in the browser

import isString from 'vanillajs-helpers/isString';
import findByClass from './findByClass';
import findById from './findById';
import findByTagName from './findByTagName';
import findByQuery from './findByQuery';
function find(elm, selector) {
    if (isString(elm)) {
        [elm, selector] = [document, elm];
    }
    const query = selector;
    const isComplex = [' ', '>', '+', '*', '~', ':', '[', ',']
        .some((char) => query.indexOf(char) > -1);
    if (!isComplex) {
        const firstChar = query[0];
        const rest = query.substring(1);
        const isId = firstChar === '#';
        const isClass = firstChar === '.';
        const hasClass = rest.indexOf('.') > -1;
        const hasId = rest.indexOf('#') > -1;
        if (isId && !hasClass) {
            return findById(rest);
        }
        if (isClass && !hasId) {
            return findByClass(elm, rest.replace(/\./g, ' '));
        }
        if (!isClass && !isId && !(hasId || hasClass)) {
            return findByTagName(elm, selector);
        }
    }
    return findByQuery(elm, query);
}
export default find;