殮.Callback execution error: TypeError: Cannot convert object to primitive value錯誤類似于這種情況：TypeError: Cannot convert object to primitive value情況通常是由于嘗試將一個對象轉換成原始值（如字符串、數字等）時發(fā)生的，而該對象無法被正確轉換。例如，當使用Object.prototype.valueOf()或Object.prototype.toString()方法時，如果對象返回一個不可轉義的值，就會拋出這個錯誤。
殮.錯誤分析： To understand this error, let's analyze the scenario where it occurs. Suppose we have an object obj and we attempt to convert it to a primitive value using `obj + ""
殮.解決方案：** To fix this error, ensure that any method returning a primitive from an object is properly implemented. For example, implementing valueOf() or toString() correctly can resolve the issue.
殮.Demo示例：** Here's an example demonstrating the error and its fix:
// 拋出異常的示例
let obj = {
valueOf: function() {
return {}; // 返回對象，導致無法轉換為原始值
}
};
console.log(obj + ""); // 拋出TypeError: Cannot convert object to primitive value
// 修正后的示例
let objFixed = {
valueOf: function() {
return "123"; // 返回字符串，成功轉換
}
};
console.log(objFixed + ""); // 輸出"123"
殮.總結：** The error TypeError: Cannot convert object to primitive value occurs when an object cannot be converted into a primitive type. Proper implementation of methods like valueOf() or toString() ensures that objects can be converted correctly.
殮.#JavaScript錯誤 #TypeError #對象轉換 #開發(fā)技巧