this.context.router.push() 不能跳转

Question

代码：
class Component extends React.Component {

static contextTypes = {
    router:PropTypes.object.isRequired
};
handleSubmit (e) {
   ...
    fetch('xxx', {
        ...
    })
        .then(...)
        .then((res) => {
            if (...) {
                this.context.router.push('xxx');
                return;
                ...

报错：

不太明白这个报错_this2是什么意思

Answer 1

this.context.router.history.push