CODE EXAMPLE FOR JAVASCRIPT

element ui loading schange text

import { Loading } from 'element-ui';

...
const options = {
	 text: "Loading ..."
    customClass: 'login_loading',
    spinner: 'el-icon-loading',
    lock: true,
};
this.loadingInstance = Loading.service(options);

this.loadingInstance.setText ( 'new text');