如何创建这个倒置的两层边框？

Question

有没有什么办法在CSS或jQuery中制作自定义的勺子边框样式？

像下面的图片：

Answer 1

你可以做到这一点使用单div与:after和:before：伪元素和radial-gradient秒。

div { 
 
    position: relative; 
 
    width: 400px; 
 
    height: 400px; 
 
    background: -webkit-radial-gradient(top left, #ECECEC 3%, transparent 3%), -webkit-radial-gradient(bottom left, #ECECEC 3%, transparent 3%), -webkit-radial-gradient(top right, #ECECEC 3%, transparent 3%), -webkit-radial-gradient(bottom right, #ECECEC 3%, transparent 3%); 
 
    background: -moz-radial-gradient(top left, #ECECEC 3%, transparent 3%), -moz-radial-gradient(bottom left, #ECECEC 3%, transparent 3%), -moz-radial-gradient(top right, #ECECEC 3%, transparent 3%), -moz-radial-gradient(bottom right, #ECECEC 3%, transparent 3%); 
 
    background: radial-gradient(top left, #ECECEC 3%, transparent 3%), radial-gradient(bottom left, #ECECEC 3%, transparent 3%), radial-gradient(top right, #ECECEC 3%, transparent 3%), radial-gradient(bottom right, #ECECEC 3%, transparent 3%); 
 
    margin: 0 auto; 
 
    border: 40px solid #ECECEC; 
 
    z-index: -1; 
 
    padding: 30px; 
 
} 
 
div:after { 
 
    position: absolute; 
 
    content: ''; 
 
    width: 103%; 
 
    height: 103%; 
 
    left: -1.5%; 
 
    top: -1.5%; 
 
    background: -webkit-radial-gradient(top left, white 3%, transparent 3%), -webkit-radial-gradient(bottom left, white 3%, transparent 3%), -webkit-radial-gradient(top right, white 3%, transparent 3%), -webkit-radial-gradient(bottom right, white 3%, transparent 3%); 
 
    background: -moz-radial-gradient(top left, white 3%, transparent 3%), -moz-radial-gradient(bottom left, white 3%, transparent 3%), -moz-radial-gradient(top right, white 3%, transparent 3%), -moz-radial-gradient(bottom right, white 3%, transparent 3%); 
 
    background: radial-gradient(top left, white 3%, transparent 3%), radial-gradient(bottom left, white 3%, transparent 3%), radial-gradient(top right, white 3%, transparent 3%), radial-gradient(bottom right, white 3%, transparent 3%); 
 
    border: 3px solid white; 
 
    box-sizing: border-box; 
 
    z-index: 0; 
 
} 
 
div:before { 
 
    position: absolute; 
 
    content: ''; 
 
    width: 106%; 
 
    height: 106%; 
 
    left: -3%; 
 
    top: -3%; 
 
    background: -webkit-radial-gradient(top left, #ECECEC 4%, transparent 4%), -webkit-radial-gradient(bottom left, #ECECEC 4%, transparent 4%), -webkit-radial-gradient(top right, #ECECEC 4%, transparent 4%), -moz-radial-gradient(bottom right, #ECECEC 4%, transparent 4%); 
 
    background: -moz-radial-gradient(top left, #ECECEC 4%, transparent 4%), -moz-radial-gradient(bottom left, #ECECEC 4%, transparent 4%), -moz-radial-gradient(top right, #ECECEC 4%, transparent 4%), -moz-radial-gradient(bottom right, #ECECEC 4%, transparent 4%); 
 
    background: radial-gradient(top left, #ECECEC 4%, transparent 4%), radial-gradient(bottom left, #ECECEC 4%, transparent 4%), radial-gradient(top right, #ECECEC 4%, transparent 4%), radial-gradient(bottom right, #ECECEC 4%, transparent 4%); 
 
    z-index: 1; 
 
}

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