uview-ui-pr/components/u-poster/lib/util.js

uView UI，是uni-app生态优秀的UI框架，全面的组件和便捷的工具会让您信手拈来，如鱼得水

function isValidUrl(url) {
	return isOnlineUrl(url) || isDataUrl(url);
}

// ./或/ 开头的路径 视为 本地路径
function isLocalUrl(url) {
	return /\.?\//.test(url);
}

function isOnlineUrl(url) {
	return /(ht|f)tp(s?):\/\/([^ \\/]*\.)+[^ \\/]*(:[0-9]+)?\/?/.test(url);
}

function isDataUrl(url) {
	return /data:image\/(\w+);base64,(.*)/.test(url);
}

/**
 * 深度对比两个对象是否一致
 * from: https://github.com/epoberezkin/fast-deep-equal
 * @param  {Object} a 对象a
 * @param  {Object} b 对象b
 * @return {Boolean}   是否相同
 */
/* eslint-disable */
function equal(a, b) {
	if (a === b) return true;

	if (a && b && typeof a == "object" && typeof b == "object") {
		var arrA = Array.isArray(a),
			arrB = Array.isArray(b),
			i,
			length,
			key;

		if (arrA && arrB) {
			length = a.length;
			if (length != b.length) return false;
			for (i = length; i-- !== 0; ) if (!equal(a[i], b[i])) return false;
			return true;
		}

		if (arrA != arrB) return false;

		var dateA = a instanceof Date,
			dateB = b instanceof Date;
		if (dateA != dateB) return false;
		if (dateA && dateB) return a.getTime() == b.getTime();

		var regexpA = a instanceof RegExp,
			regexpB = b instanceof RegExp;
		if (regexpA != regexpB) return false;
		if (regexpA && regexpB) return a.toString() == b.toString();

		var keys = Object.keys(a);
		length = keys.length;

		if (length !== Object.keys(b).length) return false;

		for (i = length; i-- !== 0; )
			if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;

		for (i = length; i-- !== 0; ) {
			key = keys[i];
			if (!equal(a[key], b[key])) return false;
		}

		return true;
	}

	return a !== a && b !== b;
}

module.exports = {
	isValidUrl,
	isLocalUrl,
	isOnlineUrl,
	isDataUrl,
	equal,
};