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There are four functions for us to get the document elements , and all of them are the functions of document : getElementById() , getElementByClassName() , getElementByName() , getElementByTagName() .

Event are certain actions performed either by the users or by the browser itself , like click , load or mouseover . There are four event handlers in JavaScript : HTML event handler , DOM level 0 event

There are seven data types in ECMAScript . Six of them are simple data types , you can call them primitive types : Undefined , Null , Boolean , Number , String and Function . One is complex data type

This is a component library , wrote by myself , include alert , confirm , list , navigationBar , tabBar . The alert component and the confirm component are completed . But I think they are not perfect

Long time no see , guys . Been very busy recently . But I didn't stop coding . I just had no time to share with you . Now I have a little time to write this blog .   This time I want to talk about U