a标签调用js方法

<a href="#" onclick="myFunction()">点击我</a>

<script>
function myFunction() {
    alert('Hello!');
}
</script>

<a href="#" id="myLink">点击我</a>

<script>
document.getElementById('myLink').addEventListener('click', function(event) {
    event.preventDefault(); // 阻止默认跳转行为
    myFunction();
});

function myFunction() {
    alert('Hello!');
}
</script>

<a href="#" class="myLink" data-param="value1">点击我 1</a>
<a href="#" class="myLink" data-param="value2">点击我 2</a>

<script>
var links = document.querySelectorAll('.myLink');
links.forEach(function(link) {
    link.addEventListener('click', function(event) {
        event.preventDefault();
        var param = this.getAttribute('data-param');
        myFunction(param);
    });
});

function myFunction(param) {
    alert('参数值为：' + param);
}
</script>