} else if (this.readyState === XMLHttpRequest.DONE && this.status >= 400) {
const content = this.responseText;
const data = content.startsWith('{') ? JSON.parse(content) : {message: content};
} else if (this.readyState === XMLHttpRequest.DONE && this.status >= 400) {
const content = this.responseText;
const data = content.startsWith('{') ? JSON.parse(content) : {message: content};