写自已的js类库需要的核心代码
2024-05-06 14:21:37
供稿：网友
代码如下:
(function(win) {
var toString = Object.prototype.toString;
var hasOwn = Object.prototype.hasOwnProperty;
var class2type = {};
class2type["[object Boolean]"] = "boolean";
class2type["[object Number]"] = "number";
class2type["[object String]"] = "string";
class2type["[object Function]"] = "function";
class2type["[object Array]"] = "array";
class2type["[object Date]"] = "date";
class2type["[object RegExp]"] = "regexp";
class2type["[object Object]"] = "object";
win.type = function(obj) {
return obj == null ? String(obj) : class2type[toString.call(obj)] || "object";
};
win.isBoolean = function(obj) {
return type(obj) === "boolean";
};
win.isNumber = function(obj) {
return type(obj) === "number";
};
win.isString = function(obj) {
return type(obj) === "string";
};
win.isDate = function(obj) {
return type(obj) === "date";
};
win.isRegExp = function(obj) {
return type(obj) === "regexp";
};
win.isObject = function(obj) {
return type(obj) === 'object';
};
win.isFunction = function(obj) {
return type(obj) === "function";
};
win.isArray = function(obj) {
return type(obj) === "array";
};
win.isWindow = function(obj) {
return obj
&& typeof obj === "object"
&& "setInterval" in obj;
};
win.isNumeric = function(obj) {
return !isNaN(parseFloat(obj)) && isFinite(obj);
};
win.isPlainObject = function(obj) {
if (!obj
|| type(obj) !== "object"
|| obj.nodeType
|| isWindow(obj)) {
return false;
}
try {
if (obj.constructor
&& !hasOwn.call(obj, "constructor")
&& !hasOwn.call(obj.constructor.prototype, "isPrototypeOf")) {
return false;
}
} catch (e) {
return false;
}
var key;
for (key in obj) {
}
return key === undefined || hasOwn.call(obj, key);
};
win.isEmptyObject = function(obj) {
for ( var name in obj) {
return false;
}
return true;
};
win.isPrimitive = function(obj){
var type = typeof obj;
return type === 'string' || type === 'number' || type === 'boolean';
};
//HTMLElement
win.isElement = function(obj){
return obj ? obj.nodeType === 1 : false;
};
//TextNode
win.isTextNode = function(obj){
return obj ? obj.nodeName === "#text" : false;
};
win.isIterable = function(obj){
return (obj && typeof obj !== 'string') ? obj.length !== undefined : false;
};
win.isDefined = function(obj){
return typeof obj !== 'undefined';
};
win.error = function(msg) {
throw new Error(msg);
};
win.now = function() {
return (new Date()).getTime();
};
win.print = function(value) {
document.write(value);
};
win.println = function(value) {
print(value);
document.write("<br/>");
};
win.each = function(object, callback, args) {
var name, i = 0,
length = object.length,
isObj = (length === undefined || isFunction(object));
if (args) {
