After a custom error handler is installed, the parser doesn't throw exceptions anymore.
安装了定制错误处理器后,语法分析器不再抛出异常。
Note: Be sure to enter a period after custom in the class name.
注意:确保在这个类名称的自定义之后键入一个点符号。
Using this technique, you could execute custom validation logic before allowing the form to be submitted, or you could trigger a custom event after the form is submitted.
使用这种技术,您可以在允许提交表单之前执行定制验证逻辑,或者在表单提交之后触发一个定制事件。
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