我正在尝试编写一个函数,根据此字符串中的数字更改学生的颜色。
如何让JavaScript在字符串中查找数字并实现if语句?
// courses grades function
function passStudentInfo(studentID) {
$.get("https://college.com/api/getCourses/" + studentID, function (data) {
if (!data || !data.length) {
console.log = 'not getting courses';
return;
}
data.forEach(function(element) {
document.getElementById('grade').innerHTML += element.courseName + ": " + element.examMark + "<br />" + "<hr>";
//this is the function I'm trying to write
function colors() {
let allGrades = document.getElementById('grade');
for (i = 0; i < allGrades.length; i++ ) {
if ( ?? < 60) {
allGrades[i].innerHTML.style.color = 'red';
} else if ( ?? >= 60 && x < 80 ) {
allGrades[i].innerHTML.style.color = 'yellow';
}
else {
allGrades[i].innerHTML.style.color = 'green';
}
}
}
colors()
//this is my html page
<h1 class="green">Your Grades</h1>
<h2>A summary of Your achievements</h2>
<div class="container achieve">
<p id="grade"></p>
</div>
.achieve {
border: 2px solid #3d3e5b;
margin-bottom: 2rem;
padding-top: 1rem;
}
.achieve p {
font-weight: 600;
font-size: 1.5;
}
我希望包含等级小于60的句子的红色字符串输出,黄色为60-80,绿色为80以上。
完成它的一种方法示例,检查forEach中的examMark并将适当的类应用于每行中的周围元素。
var data = [
{courseName: 'Math', examMark: 76.4},
{courseName: 'Science', examMark: 66.3},
{courseName: 'Spanish', examMark: 98.6}
];
data.forEach(function(element) {
// figure out what color the grade gives
var gradeColor = 'red';
if (element.examMark >= 80) {
gradeColor = 'green';
} else if (element.examMark >= 60) {
gradeColor = 'yellow';
}
document.getElementById('grade').innerHTML += "<div class='" + gradeColor + "'>" + element.courseName + ": " + element.examMark + "</div>";
});
.red {
color: red;
}
.yellow {
color: yellow;
}
.green {
color: green;
}
<div id='grade'></div>
对于If语句,请尝试使用> =或<=。当我的if语句不能正常工作时,它对我有用。替换所有<with <=或> =。