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August 3, 2018 07:42
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eventemitter
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8"> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
<meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
<title>Document</title> | |
</head> | |
<body> | |
hello | |
<script> | |
! function(t, e) { | |
"object" == typeof exports && "undefined" != typeof module ? module.exports = e() : "function" == typeof define && define.amd ? define(e) : t.EventEmitter = e() | |
}(this, function() { | |
"use strict"; | |
function t(t) { | |
var e = typeof t; | |
if ("function" !== e) throw new TypeError("Expected listener to be a function, but " + e) | |
} | |
return function() { | |
function e() { | |
this._listeners = {} | |
} | |
return e.prototype.on = function(e, n) { | |
t(n), this._hasListeners(e) || (this._listeners[e] = []), this._listeners[e].push(n) | |
}, e.prototype.off = function(e, n) { | |
n && t(n), this._hasListeners(e) && (n ? (this._listeners[e] = function(t, e) { | |
if (t.filter) return t.filter(e); | |
for (var n = t.length, i = [], r = 0; r < n; r++) e(t[r], r, t) && i.push(t[r]); | |
return i | |
}(this._listeners[e], function(t) { | |
return t !== n && t.key !== n | |
}), 0 === this._listeners[e].length && delete this._listeners[e]) : delete this._listeners[e]) | |
}, e.prototype.once = function(e, n) { | |
var i = this; | |
t(n); | |
var r = function() { | |
for (var t = [], r = 0; r < arguments.length; r++) t[r] = arguments[r]; | |
i.off(e, n), n.apply(void 0, t) | |
}; | |
r.key = n, this.on(e, r) | |
}, e.prototype.emit = function(t) { | |
for (var e = [], n = 1; n < arguments.length; n++) e[n - 1] = arguments[n]; | |
this._hasListeners(t) && function(t, e) { | |
if (t.forEach) return t.forEach(e); | |
for (var n = t.length, i = 0; i < n; i++) e(t[i], i, t) | |
}(this._listeners[t].slice(), function(t) { | |
return t.apply(void 0, e) | |
}) | |
}, e.prototype._hasListeners = function(t) { | |
return Object.prototype.hasOwnProperty.call(this._listeners, t) | |
}, e | |
}() | |
}); | |
//# sourceMappingURL=EventEmitter.min.js.map | |
var emitter = new EventEmitter(); | |
emitter.on('test', function (str) { | |
alert(str) | |
}) | |
emitter.emit('test', 'hello') | |
</script> | |
</body> | |
</html> |
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