How to convert javascript string to Boolean

Javascript method to convert a string to a Boolean value: 1. Create an HTML sample file; 2. Add a script tag; 3. Convert the string to A Boolean value is sufficient.

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript How to convert string to Boolean?

js Convert string to Boolean value boolean

Boolean(); If the parameters are 0, null and no parameters, it returns false, and if there are parameters, it returns true.

Boolean("");  //输出为：false
Boolean(null);  //输出为：false
Boolean(0);  //输出为：false 
Boolean("hi");  //输出为：true
Boolean(100);  //输出为：true
Boolean(new  Object());  //输出为：true

Related introduction:

Creating a Boolean object

The Boolean object represents two values: "true" or "false"

The following code defines a Boolean object named myBoolean:

var myBoolean=new Boolean();

If the Boolean object has no initial value or its value is:

0

-0

null

""

false

undefined

NaN

Then the value of the object is false. Otherwise, its value is true (even when the variable value is the string "false")!

Recommended study: "javascript basic tutorial"

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