Question

我想创建一个没有任何关系的链接，这意味着它是一个假链接

我尝试使用onclick =＆＃34; mijava（）;返回false;＆＃34;但它在网站上滚动

我该怎么做？

Answer 1

的javascript：

document.getElementById("nothing").addEventListener("click", function(event){
event.preventDefault()
});

HTML：

<a id="nothing" href="#">Link</a>

JSFiddle

Answer 2

"javascript:void(0)"到href属性，<a>标记将不执行任何操作。

Answer 3

这不会做任何事情。

<a href="">Link</a>

Answer 4

您可以使用CSS将其设置为类似链接的样式，如果它不会像一个锚定标记那样，您可能不想使用锚标记。

请参阅此答案：How to make an anchor tag refer to nothing?

Answer 5

你测试它吗？

public class ElemType
{
    public string MyProperty { get; set; }
}

public static class ElemTypePropertySelector
{
    private static Dictionary<string, Func<string[], Func<ElemType, bool>>> dictionary = new Dictionary<string, Func<string[], Func<ElemType, bool>>>();

    public static IEnumerable<ElemType> WhereIn(this IEnumerable<ElemType> query, string filterFieldName, string[] values) {
        var cachedFactory = GetOrAdd(filterFieldName);
        var contains = cachedFactory(values);

        return query.Where(contains);
    }

    private static Func<string[], Func<ElemType, bool>> GetOrAdd(string filterFieldName) {
        Func<string[], Func<ElemType, bool>> cachedFunc;

        if (!dictionary.TryGetValue(filterFieldName, out cachedFunc)) {
            cachedFunc = CreateFactory(filterFieldName);
            dictionary.Add(filterFieldName, cachedFunc);
        }

        return cachedFunc;
    }

    private static Func<string[], Func<ElemType, bool>> CreateFactory(string filterFieldName) {
        MethodInfo mi = typeof(Enumerable).GetMethods().Where(x => string.Equals(x.Name, "Contains", StringComparison.OrdinalIgnoreCase)).Single(x => x.GetParameters().Length == 2).MakeGenericMethod(typeof(string));
        PropertyInfo pi = typeof(ElemType).GetProperty(filterFieldName);
        ParameterExpression arrExpression = Expression.Parameter(typeof(string[]), "arr");
        ParameterExpression rtParam = Expression.Parameter(typeof(ElemType), "et");
        var callExpression = Expression.Call(null, mi, new Expression[] { arrExpression, Expression.Property(rtParam, pi) });
        var innerExpression = Expression.Lambda<Func<ElemType, bool>>(callExpression, new[] { rtParam });
        var expression = Expression.Lambda<Func<string[], Func<ElemType, bool>>>(innerExpression, new ParameterExpression[] { arrExpression });

        return expression.Compile();
    }
}

class Program
{
    static void Main(string[] args) {
        var query = new List<ElemType> { 
            new ElemType { MyProperty = "aaa" }, 
            new ElemType { MyProperty = "bbb" }, 
            new ElemType { MyProperty = "cccc" } 
        };

        var result = query.WhereIn("MyProperty", new[] { "aaa", "bbb" });
    }
}

如何创建无效的链接？

5 个答案: