Check Is String Javascript Code Example
Example 1: is string javascript function isString ( value ) { return typeof value === 'string' || value instanceof String ; } isString ( '' ) ; // true isString ( 1 ) ; // false isString ( { } ) ; // false isString ( [ ] ) ; // false isString ( new String ( 'teste' ) ) // true Example 2: if string javascript if ( typeof myVar === 'string' ) { /* code */ } ; Example 3: js check if variable is string if ( typeof myVar === 'integer' ) { //I am indeed an integer } if ( typeof myVar === 'boolean' ) { //I am indeed a boolean } Example 4: if variable is string javascript var booleanValue = true ; var numericalValue = 354 ; var stringValue = "This is a String" ; var stringObject = new String ( "This is a String Object" ) ; alert ( typeof booleanValue ) // displays "boolean" alert ( typeof numericalValue ) // displays "number" alert ( ...