這前寫過一版phaser3微信小遊戲，現在看來，有更好的方案。

擴充套件此方案可以更新的本地快取。

Phaser.Loader.File.prototype.defload = Phaser.Loader.File.prototype.load;

Phaser.Loader.File.prototype.onLoad = function (xhr, event) {
var localFileOk = ((xhr.responseURL && xhr.responseURL.indexOf('file://') === 0 && xhr.status === 0));
 
var success = !(xhr && xhr.status !== 200) || localFileOk;
if (xhr.readyState === 4 && xhr.status >= 400 && xhr.status <= 599){
success = false;
}
this.state = 12;
this.resetXHR();
this.loader.nextFile(this, success);
}

Phaser.Loader.File.prototype.load = function() {
if (this
 
.type == "image") {
this.data = new Image();
let self = this;
this.data.onload = function() {
self.state = 12;
self.loader.inflight.delete(self);
self.loader.totalComplete++;
self.loader.queue.set(self);
self.loader.emit("load", self);
self.onProcessComplete();
}
let src = this.url;
this.data.src = src;
} 
 
else {
this.defload();
}
}