Error in callback for watcher "pointList": "TypeError: Cannot read properties of undefined (reading 'svg')"

这个错误提示意味着在监视"pointList"属性时，回调函数中的"svg"属性无法读取。这可能是因为"pointList"属性未被正确定义或未被正确初始化。解决方法可能包括检查代码中是否存在拼写错误或语法错误，确保"pointList"属性被正确定义和初始化，以及确保回调函数中的"svg"属性被正确引用。另外，也可以尝试使用调试工具来查找错误的根本原因。

相关问题

Error in callback for watcher "echartData": "TypeError: Cannot read properties of undefined (reading 'length')"

以下是关于"Error in callback for watcher 'echartData': 'TypeError: Cannot read properties of undefined (reading 'length')'"的解释和演示：
1. 对象属性检查

var b = {name:1}
console.log(b.hasOwnProperty('name')) // 输出：true

2. Promise执行顺序

const p1 = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve(1)
    throw new Error('p1失败信息')
  }, 2000)
})

const p2 = p1
  .then((val) => {
    console.log(val, 'p2成功返回的')
    return val + 1
  })
  .catch((err) => {
    console.log(err, 'p2失败返回的')
    return err
  })

Promise.all([p2, Promise.reject(3)])
  .then((val2) => {
    console.log(val2, 'all成功返回的')
  })
  .catch((err2) => {
    console.log(err2, 'all失败返回的')
})

Error in callback for watcher "inventoryList": "TypeError: Cannot read properties of undefined (reading 'apply')"

这个错误提示的意思是在监视属性"inventoryList"的回调函数中发生了一个错误，具体是"TypeError: Cannot read properties of undefined (reading 'apply')"。这个错误通常是由于在定义监视器时未正确设置回调函数引起的。解决这个问题的方法是确保正确定义监视器的回调函数，并确保函数名没有拼写错误。您可以检查一下代码中与"inventoryList"相关的监视器的回调函数是否正确设置，以及是否存在拼写错误。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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