[英]Calling a javascript function from another javascript file and getting Reference errors and Invalid state errors and some warnings inside atom IDE
I am a new to javascript coding in p5 and i am getting errors when trying to call a function from another javascript file. 我是p5中javascript编码的新手,尝试从另一个javascript文件调用函数时遇到错误。 Here is my html file: 这是我的html文件:
<!DOCTYPE html>
<html lang="">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>p5.js example</title>
<style> body {padding: 0; margin: 0;} </style>
<script src="../p5.min.js"></script>
<script src="../addons/p5.dom.min.js"></script>
<script src="../addons/p5.sound.min.js"></script>
<script src="sketch.js"></script>
<script src="file.js"></script>
</head>
<body>
</body>
</html>
Here is my javascript file 1: 这是我的JavaScript文件1:
function setup() {
createCanvas(400,400);
}
function draw(){
pr("hello world",x,y);
}
Here is my javascript file 2: 这是我的JavaScript文件2:
function pr(text,x,y){
text(text,x,y);
}
I edited the function arguments because i forgot that text function has a different sytnax than i wrote. 我编辑了函数参数,因为我忘记了文本函数与我编写的语法不同。 Still getting errors: 仍然出现错误:
InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable
Use of the orientation sensor is deprecated. p5.min.js:3:232007
Use of the motion sensor is deprecated. p5.min.js:3:232007
ReferenceError: x is not defined
The files has different scope, so one isn't aware of the other. 这些文件的作用域不同,因此一个文件不知道另一个文件。 If you want a function to be accessible from another file you need to add it to a shared scope. 如果要从另一个文件访问功能,则需要将其添加到共享范围。 You can put it on the window (global scope) object and then to use it elsewhere. 您可以将其放在窗口(全局范围)对象上,然后在其他地方使用它。
file1: 文件1:
function there(text){
console.log(text)
}
window.there = there
file2: 文件2:
function here(){
there("hello world");
}
here()
In your html file you should first import file1 and after that file2. 在html文件中,您应该先导入file1,然后再导入file2。 That way when you call it it is already the. 这样,当您调用它时就已经可以了。
NOTE: writing on the window object is not a good practice! 注意:在窗口对象上书写不是一个好习惯! you should probably find a tool that creates a bundle an let you access a function from another file. 您可能应该找到一个创建捆绑软件的工具,让您可以从另一个文件访问功能。 Check Webpack for example. 例如,检查Webpack 。
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