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为什么：Uncaught ReferenceError: effect is not defined

2022-04-21 20:37:00 【hamimelon2020】

<!DOCTYPE html>
<html>
    <head>
        <title>document.write() Example</title>
    </head>
    <body>
        <script type="text/javascript"> 
        
        effect(function effectFn1() {
    
            effect(function effectFn2() {
    })
        })
        

const data = {
     foo: true, bar: true }
const obj = new Proxy(data, {
    
})

let temp1, temp2
effect(function effectFn1() {
    
    console.log('effectFn1执行')
effect(function effectFn2() {
    
    console.log('effectFn2执行')
})
temp1 = obj.foo
})
             </script> 
    </body>

</html>