永康网站推广,个人网站建设报告,襄阳网站建设找下拉哥科技,网站做营销推广公司for ... in 循环用于循环访问对象的属性#xff0c;由于无涯教程尚未讨论Objects对象#xff0c;您就会发现此循环非常有用。“ for...in”循环的语法为: for (variablename in object) {statement or block to execute
}
在每次迭代中#xff0c;将 object对象中的一个属性… for ... in 循环用于循环访问对象的属性由于无涯教程尚未讨论Objects对象您就会发现此循环非常有用。“ for...in”循环的语法为: for (variablename in object) {statement or block to execute
}
在每次迭代中将 object对象中的一个属性分配给 variablename 变量此循环一直进行到对象的所有属性。
请尝试以下示例来实现 for-in循环它将打印网络浏览器的 Navigator 对象。
htmlbody script type text/javascript!--var aProperty;document.write(NavigatorObjectPropertiesbr / ); for (aProperty in navigator) {document.write(aProperty);document.write(br /);}document.write (Exiting from the loop!);//--/script pSet the variable to different object and then try.../p/body
/html
运行上面代码输出
NavigatorObjectProperties
serviceWorker
webkitPersistentStorage
webkitTemporaryStorage
geolocation
doNotTrack
onLine
languages
language
userAgent
product
platform
appVersion
appName
appCodeName
hardwareConcurrency
maxTouchPoints
vendorSub
vendor
productSub
cookieEnabled
mimeTypes
plugins
javaEnabled
getStorageUpdates
getGamepads
webkitGetUserMedia
vibrate
getBattery
sendBeacon
registerProtocolHandler
unregisterProtocolHandler
Exiting from the loop!
Set the variable to different object and then try... 参考链接
https://www.learnfk.com/javascript/javascript-forin-loop.html
