Function copyText

nodeImage.js:518–536

(t, onOk, onErr)

        return false;
    }
    function copyText(t, onOk, onErr) {
        if (navigator.clipboard && navigator.clipboard.writeText) {
            navigator.clipboard.writeText(t).then(onOk).catch(onErr);
        } else {
            try {
                var ta = document.createElement('textarea');
                ta.value = t;
                ta.style.position = 'fixed';
                ta.style.left = '-9999px';
                document.body.appendChild(ta);
                ta.select();
                document.execCommand('copy');
                ta.remove();
                onOk();
            } catch (e) {
                onErr();
            }
        }
    }
    function validateImageFile(file) {
        if (!file) return '请选择图片文件';
        if (file.size > MAX_BYTES) return '文件超过 100MB 限制';