IsRequired

检查当前表单是否为必填项。

语法

expression.IsRequired();

expression - 表示 ApiCheckBoxForm 类的变量。

参数

此方法没有任何参数。

返回值

boolean

示例

此示例检查当前表单是否为必填项。

// How to know whether a text form is required or not.

// Display a boolean representing whether a text form is required.

let doc = Api.GetDocument();
let textForm = Api.CreateTextForm({"key": "Personal information", "tip": "Enter your first name", "required": true, "placeholder": "First name", "comb": true, "maxCharacters": 10, "cellWidth": 3, "multiLine": false, "autoFit": false});
let paragraph = doc.GetElement(0);
paragraph.AddElement(textForm);
let required = textForm.IsRequired();
paragraph = Api.CreateParagraph();
paragraph.AddText("The first form from this document is required: " + required);
doc.Push(paragraph);