您可以使用ionic framework对此进行纯javascript文件上载。

const url = \'YOUR_WP_ACTION_RUL\';
const form = document.querySelector(\'form\');

form.addEventListener(\'submit\', e => {
    e.preventDefault();

    const files = document.querySelector(\'[type=file]\').files;
    const formData = new FormData();

    for (let i = 0; i < files.length; i++) {
        let file = files[i];

        formData.append(\'files[]\', file);
    }

    fetch(url, {
        method: \'POST\',
        body: formData
    }).then(response => {
        console.log(response);
    });
});