我正在尝试创建一个能够暴露一些函数的ajaxHelper模块,当它们被调用时,应该返回一个帮助对象,该对象具有从AJAX调用中检索的数据或与该AJAX相关的错误调用
以下是我的想法:
define("helpers-ajaxDataRetriever", ["jquery"], function ($) {
var helper = {};
helper.getIndexData = function() {
fnIndexData();
return helper;
}
var fnIndexData = function () {
$.ajax({
url: nwatchBaseUrl + '/api/HomeApi/NodeSummary'
}).success(function (returnedData) {
helper.success = true;
helper.data = returnedData;
}).fail(function (jqXHR, textStatus) {
helper.success = false;
helper.error.jqXHR = jqXHR;
helper.error.textStatus = textStatus;
});
}
});
然后我想要导入这个ajaxHelper的其他模块能够调用函数(例如getIndexData),这将最终填充辅助对象,然后能够引用各种属性,例如布尔成功,数据或错误对象。
我该怎么做?
答案 0 :(得分:1)
为了使它按照您期望的方式工作,模块必须返回您希望向外界公开的属性(以供其他模块使用)。
由于 <plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-javadoc-plugin</artifactId>
<configuration>
<additionalparam>-Xdoclint:missing</additionalparam>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<testSource>1.8</testSource>
<testTarget>1.8</testTarget>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<systemPropertyVariables>
<beamTestPipelineOptions>
</beamTestPipelineOptions>
</systemPropertyVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
</plugin>
<!-- Source plugin for generating source and test-source JARs. -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-source-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
</plugin>
<!-- Coverage analysis for unit tests. -->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
</plugin>
</plugins>
是异步的,因此最好使用回调来解决此类场景,而不是直接访问变量。因为您不知道ajax
调用何时成功完成并返回数据。
ajax
由于我们只想在上面的例子中公开define("helpers-ajaxDataRetriever", ["jquery"], function($) {
var helper = {};
// you will pass in the options
// which will contains the success and error
// callbacks, along with additional props
// that you wanna pass in and use
helper.getIndexData = function(options) {
fnIndexData(options);
}
var fnIndexData = function(options) {
$.ajax({
url: options.nwatchBaseUrl + '/api/HomeApi/NodeSummary'
}).success(function(returnedData) {
options.success && options.success.apply(null, arguments);
}).fail(function(jqXHR, textStatus) {
options.error && options.error.apply(null, arguments);
});
}
// You return the object, which are the public methods
// or properties which you wanna expose when this module is used
return {
getIndexData: getIndexData
}
});
// This is when you wanna use the above exposed function
// in any module
define("use-ajax", ["helpers-ajaxDataRetriever"], function(customAjax) {
var options = {
success: function(data) {
console.log('success');
// use the data
}, error: function(jqXHR, textStatus) {
console.log('failure');
// you will have access to the
// arguments of the error function here
},
nwatchBaseUrl: 'https://google.com/'
}
customAjax.getIndexData(options);
});
,我们可以完全摆脱辅助命名空间,只返回函数定义。
您还可以使用 promise
的概念来实现保存