Common Errors Javascript Essential Training

Common Errors Javascript Essential Training

Javascript, TUTORIALS, WEB

Common Errors Javascript Essential Training




In this lesson Common Errors Javascript Essential Training we are gonna show what are the common errors all the developers make when they make codes. Here we show some basic typo and syntax kind of errors like spelling mistake, camel Case mistakes, calling the non existing functions and etc.
As we told in earlier lessons we have to concentrate on some important procedures when me make the code. Like maintain the variable naming, Structure of the coding blocks, Order of calling the function and etc.
If we miss these rules then we can face lot of issues in various situations. This lesson will shows Common Errors Javascript Essential Training
Syntax Errors – Common Errors Javascript Essential Training
There are lot of syntax errors are the possible errors in javascript, consider the following examples for find what is the Syntax Error and how to find it.

Common Errors Javascript Essential Training
In the above block of codes will gives us the unterminated string literal error, it intimates us that we are missing the double quote literal at the end of the log function. And then if we clear the error then the result will be like this,
Common Errors Javascript Essential Training
Calling Non – Existent Function – Common Errors Javascript Essential Training
Here we got an error for calling the undefined function and get the following error for the non-existent functions.
Common Errors Javascript Essential Training
And change the function name as it is defined then it runs properly and produce the correct result like we expected. And we must be sure what is the function name as it is.




Typos With DOMS – Common Errors Javascript Essential Training
We getting this kind of error very often and also can’t find it easily, because it needs an more experience and clear concept understanding about its keywords.

Common Errors Javascript Essential Training
Here in above code the ID is fully capital and it needs to title case like Id. We may find there are lots of errors like this in over all programming blocks.
Non-Existent Object Method – Common Errors Javascript Essential Training
In other situation we facing the errors are misspell the object methods like revers instead of reverse and etc. Consider the following example for how to clear these kind of error and how to solve them.
Common Errors Javascript Essential Training
After clear the error we can get the result as correct and the result will be like this,
Common Errors Javascript Essential Training
Assignment Instead of Equality – Common Errors Javascript Essential Training
In this type of error we assign only single operator instead of the dual equal operator, in the operators lesson you may learn about the equality and its working like this.

Common Errors Javascript Essential Training
After clear the error (Obviously it is not an Error – Just an Unexpected Result) it shows the expected result. These are some syntax errors we obviously made in javascript programming language.
Missing Parameters in Functions – Common Errors Javascript Essential Training
In some time we forget to define the default parameters and also forget to passing the required parameters when we call the function and it shows the error without the required parameters.

It shows the NaN as result which means the result variable is hold the String or something else and it needs the correct result. So we need to check the function and its parameters then correct the errors.
Common Errors Javascript Essential Training




We hope this lesson will shows you what are the common errors javascript essential training and how to handle them and we can learn more than this in the upcoming lessons.

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