SyntaxError：missing：在Firefox中的属性id之后

Question

所有

下面的代码似乎在Chrome中运行正常，但Firefox给了我一个＆＃34;缺少：在属性ID＆＃34;之后SyntaxError错误。我认为＃34; navigateToDefault（）＆＃34;开头的语法存在问题。有什么想法吗？谢谢！

var currentMapSelection = {
PROVINCIE: undefined,
GM_CODE: undefined,
WK_CODE: undefined,
navigateToDefault(){
    this.PROVINCIE = undefined;
    this.GM_CODE = undefined;
    this.WK_CODE = undefined;

    unhideVisited();
    xyz = [482,174.75,40];
    drawCountry('nld');
    updateLegend(colorScales.provincie)
},
navigateToProv(prov){
    this.PROVINCIE = prov;
    this.GM_CODE = undefined;
    this.WK_CODE = undefined;
    unhideVisited();
    loadProvinceData(prov)
    updateLegend(colorScales.gemeente)
},
navigateBack(){
    if (this.GM_CODE) this.navigateToProv(this.PROVINCIE);
    else this.navigateToDefault();
}
}