Home
JS
JS
Tryit: JAVASCRIPT
运行 ❯
×
Change Orientation
Change Theme, Dark/Light
<!DOCTYPE html> <html> <body> <p>单击按钮检查数组中的所有答案值是否相同。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> var survey = [ { name: "Steve", answer: "Yes"}, { name: "Jessica", answer: "Yes"}, { name: "Peter", answer: "Yes"}, { name: "Elaine", answer: "No"} ]; function isSameAnswer(el,index,arr) { // 不要测试第一个数组元素，因为你没有什么可比较的 if (index === 0){ return true; } else { //每个数组元素的值是否与前一个数组元素的值匹配 return (el.answer === arr[index - 1].answer); } } function myFunction() { document.getElementById("demo").innerHTML = survey.every(isSameAnswer); } </script> </body> </html>