带有选项的 Javascript 对象函数
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Javascript object function with options
提问by devjs11
I am trying to create a function with options. I belive i have to use objects but fail so far. By options i mean something like that:
我正在尝试创建一个带有选项的函数。我相信我必须使用对象，但到目前为止失败了。通过选项，我的意思是这样的：
insertButton({
settings:{
value1:'Some text'
}
});
function insertButton(settings){
settings = new Object();
document.write(settings.value1);
}
Obviously that wont work but I am trying to show what I mean. Maybe someone could help.
显然这行不通，但我试图表明我的意思。也许有人可以帮忙。
I am asking because right now I have simple function where I can pass values with strict order. With options I want to be undependable of variables order in function. For example:
我问是因为现在我有一个简单的函数，我可以在其中以严格的顺序传递值。使用选项，我希望不依赖函数中的变量顺序。例如：
function insertButton2(value1,value2,value3){
document.write(value1);
document.write(value2);
document.write(value3);
}
insertButton2('a','','c'); //empty commas to skip value2
Leaving empty commas to make sure 'c' is value3 is not convenient for me. That is why I would like to try objects, options.
留下空逗号以确保 'c' 是 value3 对我来说不方便。这就是为什么我想尝试对象，选项。
Thx.
谢谢。
回答by Zirak
You just pass into the function an object with the required keys/values:
您只需将具有所需键/值的对象传递给函数：
function parameterify(params) {
console.log(params.isAwesome);
}
parameterify({
isAwesome : true
});
//logs true
You had two mistaknes:
你有两个错误：
There are no names parameters in js, so
{settings:{}}would pass an object with a key of settings (so that inside of the functions, you'd have to dosettings.settings)You redeclared
settingsat the top of the function (settings = new Object();), which no matter what you pass in will always overwrite it. As a side note,new Objectis iffy - object literal{}is way cooler
js 中没有名称参数，因此
{settings:{}}会传递一个带有设置键的对象（以便在函数内部，您必须这样做settings.settings）您
settings在函数 (settings = new Object();)的顶部重新声明，无论您传入什么，它都将始终覆盖它。作为旁注，new Object不确定 - 对象文字{}更酷
回答by JaredMcAteer
Well you're overwriting settingsto a blank Object in the first line of your function, take that out and it will work...
好吧，您正在settings函数的第一行覆盖一个空白对象，将其取出，它将起作用...
Edit: Sorry early remove the settings object from the arguments should just be
编辑：抱歉，早点从参数中删除设置对象应该只是
insertButton({
value1:'Some text'
});
回答by Jan Turoň
Try this
试试这个
function insertButton(settings){
document.write(settings.value1);
}
insertButton({
value1:'Some text'
});
