agar.js

(function() {
    var olddown = window.onkeydown,
        oldup = window.onkeyup;
    var repeat = 0;
    window.onkeydown = function(e) {
        e.keyCode == 69 && (repeat = 1) || olddown(e)
    };
    window.onkeyup = function(e) {
        e.keyCode == 69 && (repeat = 0, 1) || oldup(e)
    };
    var k = {
        keyCode: 87
    };
    setInterval(function() {
        if (!repeat) return;
        olddown(k);
        setTimeout(function() {
            oldup(k);
        }, 10);
    }, 20);
    setTimeout(function() {
        core.setMinimap(1);
        core.playersMinimap(1);
    }, 250)
})();

// Minified
javascript: !function(){var n=window.onkeydown,o=window.onkeyup,e=0;window.onkeydown=function(o){69==o.keyCode&&(e=1)||n(o)},window.onkeyup=function(n){69==n.keyCode&&(e=0,1)||o(n)};var i={keyCode:87};setInterval(function(){e&&(n(i),setTimeout(function(){o(i)},10))},20),setTimeout(function(){core.setMinimap(1),core.playersMinimap(1)},250)}();