标签：state new ... mis head example AC search java
壹：与XMLHttpRequest绑定的，js原生的方式
示例：
<!DOCTYPE html>
<html>
<head>
<script src="../build/react.js"></script>
<script src="../build/react-dom.js"></script>
<script src="../build/browser.min.js"></script>
</head>
<body>
<div id="example" />
<script type="text/babel">
var text = "loading";
var Result = React.createClass({
getInitialState: function () {
return {
success:false
};
},
componentDidMount: function() {
var request = new XMLHttpRequest(); // 新建XMLHttpRequest对象
request.onreadystatechange = function () { // 状态发生变化时，函数被回调
if (request.readyState === 4) { // 成功完成
// 判断响应结果:
if (request.status === 200) {
// 成功，通过responseText拿到响应的文本:
text = request.responseText;
this.setState({success:true});
} else {
// 失败，根据响应码判断失败原因:
text = ‘failed‘;
this.setState({success:false});
}
} else {
// HTTP请求还在继续...
}
}.bind(this);
request.open(‘GET‘, ‘https://api.github.com/search/repositories?q=javascript&sort=stars‘);
request.send();
},
render: function() {
return (
<div>
{text}
</div>
);
}
});
ReactDOM.render(
<Result/>,
document.getElementById(‘example‘)
);
</script>
</body>
贰：Promise
示例：
new Promise(function (resolve, reject) { console.log(‘start new Promise...‘); var timeOut = Math.random() * 2; console.log(‘set timeout to: ‘ + timeOut + ‘ seconds.‘); setTimeout(function () { if (timeOut < 1) { console.log(‘call resolve()...‘); resolve(‘200 OK‘); } else { console.log(‘call reject()...‘); reject(‘timeout in ‘ + timeOut + ‘ seconds.‘); } }, timeOut * 1000); }).then(function (r) { console.log(‘Done: ‘ + r); }).catch(function (reason) { console.log(‘Failed: ‘ + reason); });
标签：state new ... mis head example AC search java
原文地址：https://www.cnblogs.com/heben/p/8991600.html
