javascript get type of variable

JavaScript is a weakly typed language, which is a typical example of a variable that can be assigned to any type when it is used. So let's take a look at JavaScript, which has a way of using these variable types already. Let's take a look at the

JavaScript is a weakly typed language, which is a typical example of a variable that can be assigned to any type when it is used. So let's take a look at JavaScript, which has a way of using these variable types already.Let's take a look at the

Do you know the value of alert following JavaScript execution? var foo = 1; function Bar () { if (!foo) { var foo =; alert (foo); } Bar (); If you're surprised by the result of "10," you might want to take a good look at this article: var a =

positive 0 vs minus 0 Two values are almost identical except as divisor: var zero = 0; Positive 0 var negz =-0; Minus 0 Zero = = Negz; True 1/zero = = 1/negz; False "JavaScript Authority Guide" p.37undefined VS null Undefined is

JavaScript programming always avoids the inevitable declaration of functions and variables to successfully build our system, but how and where do the interpreters look for these functions and variables? What exactly happened when we quoted these

ObjectiveLong ago, it was common to think that JavaScript was doing some web effects and dealing with events.There are some old stubborn ones around me. NET programmers are still stuck in this perception, and they feel that no backend development is

JavaScript BasicsJavaScript is a scripting language that belongs to the web!JavaScript is used by millions of of pages to improve design, verify forms, detect browsers, create cookies, and more.JavaScript is the most popular scripting language on

Judgment of variable types in javascript, javascript Variables Address: http://www.xiabingbao.com/javascript/2015/07/04/javascript-type In JavaScript, there are 5 basic data types and 1 complex data type. The basic data types include:Undefined,Null,

Answer the question in the previous section first. 01 02 $foo= 10; 03 $bar= 20; 04   05

, native JavaScript implements string length interceptionView Code2. Native JavaScript gets the domain hostView Code3. Native JavaScript Clear spaceView Code4. Native JavaScript replaces allView Code5. Native JavaScript Escape HTML tagView Code6.