Android-Webview（kitkat及更低版本）：Java脚本函数“ includes”中的错误 [英] Android - Webview (kitkat and below): Error In Java Script Function 'includes'

问题描述

尝试调用WebView时，将在调用本地网页时出现错误

Trying to Call WebView , While Calling Local Web Page It will Gives Error

未捕获的TypeError：对象[ Some Object]有没有方法：'includes'，
来源：file：///storage/sdcard0/MyDemo/js/fileName.js

Uncaught TypeError: Object ["Some Object"] has no method : 'includes', source: file:///storage/sdcard0/MyDemo/js/fileName.js

它将为Kitkat及以下提供错误。
可以在Kitkat上面正常工作。

It will gives Error To Kitkat and Below. It works Properly above Kitkat.

在下面的gradle设置下可以正常工作

It was working Fine With gradle Settings below

compileSdkVersion 25
buildToolsVersion "25.0.2"

和依赖项

compile 'com.android.support:design:25.3.1'
compile 'com.android.support:support-v4:25.3.1

当前正在使用Gradle设置。

Currently Using Gradle settings.

compileSdkVersion 26
buildToolsVersion "26.0.2"
defaultConfig {
    applicationId ""
    minSdkVersion 16
    targetSdkVersion 26
    versionCode 1
    versionName "1.0"
    multiDexEnabled true    
}

compile 'com.android.support:design:26.1.0'
compile 'com.android.support:support-v13:26.1.0'
compile 'com.android.support:appcompat-v7:26.1.0'

推荐答案

发生这种情况是因为您使用的是 includes 方法在字符串我n您的js文件受最新JavaScript版本 ECMAScript 6 支持，而android kitkat webview不支持此版本。

This is happening because you are using includes method on string in your js file, which is supported in latest JavaScript Version ECMAScript 6 and android kitkat webview doesn't support this version.

使用 indexOf 代替 includes

var str = "Hello world, welcome to the universe.";

var n = str.includes("world");
# Replace above line of code and use indexOf. 

var n = str.indexOf("world") > -1;

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