Start learning Javascript

       Since yesterday, the study of HTML and CSS has come to an end, and the study of Javascript, Javascript. JavaScript is a literal scripting language. It is a dynamically typed, weakly typed, prototype-based language with built-in support for types. Its interpreter is called the JavaScript engine, which is part of the browser and is widely used in the client-side scripting language to add dynamic functionality to HTML pages .

   I have started to learn the language, although I am looking forward to it, but when the written program is run, it always reports some kind of error, just a few simple lines of code, change it over and over, and when it can run, it takes more than an hour Yes, it has to be said that it is a real dish. Sometimes the meaning of the error code may not be understood. Now summarize the frequently occurring error codes:

• • • • • • • • 1. SyntaxError: Syntax error
              • 2. Uncaught ReferenceError: reference error
              • 3. RangeError: Range error
              • 4. TypeError 
              • 5. EvalError eval() function execution error
              • 6. URIError，URL error

     At the beginning of learning, there are many knowledge points, more practice and more memorization. Otherwise, it is easy to fail to keep up with the accumulation of more and more, and the errors in the code are normal and need to be summarized more. It is also very important to find out where the code is wrong in time. Today's classwork is very interesting. Mr. Wang asked us to use the program to review our own life. I think I only have one sentence: go down the road you have identified.