var before = 'ID DERNIER MESSAGE';clearMessages = function(){
    const channel = window.location.href.split('/').pop();
    const baseURL = `https://discordapp.com/api/channels/${channel}/messages`;
    const headers = {"Authorization": "MzE3MzExMjM5MDAyOTE0ODE2.Xf5QLw.nL3eNpq4lSh-62XOwv-yJQz8g44" };

    let clock = 0;
    let interval = 300;

    function delay(duration) {
        return new Promise((resolve, reject) => {
            setTimeout(() => resolve(), duration);
        });
    }

    fetch(baseURL + '?before=' + before + '&limit=100', {headers})
        .then(resp => resp.json())
        .then(messages => {
        return Promise.all(messages.map((message) => {
            before = message.id;
            return delay(clock += interval).then(() => fetch(`${baseURL}/${message.id}`, {headers, method: 'DELETE'}));
        }));
    }).then(() => clearMessages());
}
clearMessages();