construction与typeof属性

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construction与typeof属性

construction返回值类型：

var number = 10; console.log( "Number" === number.constructor ); var string = "str"; console.log( "String" === string.constructor ); var boolean = true; console.log( "Boolean" === boolean.constructor ); var object = {}; console.log( "Object" === object.constructor ); var func = function(){}; console.log( "Function" === func.constructor ); var array = []; console.log( "Array" === array.constructor ); var date = getDate(); console.log( "Date" === date.constructor ); var regexp = getRegExp(); console.log( "RegExp" === regexp.constructor );

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typeof返回类型（与construction对比）：点击查看typeof返回类型详解

var number = 10; var boolean = true; var object = {}; var func = function(){}; var array = []; var date = getDate(); var regexp = getRegExp(); console.log( 'number' === typeof number ); console.log( 'boolean' === typeof boolean ); console.log( 'object' === typeof object ); console.log( 'function' === typeof func ); console.log( 'object' === typeof array ); console.log( 'object' === typeof date ); console.log( 'object' === typeof regexp ); console.log( 'undefined' === typeof undefined ); console.log( 'object' === typeof null );

本文标签： 属性Constructiontypeof