javascript - 无需 jQuery 将背景图像更改为数据 URI

Question

我有数据 uri 编码的背景图像，可以在 CSS 中使用:

background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='95' height='6' viewBox='0 0 95 6'%3E%3Ctitle%3Escale mod%3C/title%3E%3Cg id='Layer_2' data-name='Layer 2'%3E%3Cg id='buttonbase'%3E%3Cg id='scale_mod' data-name='scale mod'%3E%3Cpath d='M95,6H0V5H95Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M94.953,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M86.4,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M77.853,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M69.3,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M60.753,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M52.2,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M43.653,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M35.1,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M26.553,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M18,5h-.9V3H18Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M9.452,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M.9,5H0V3H.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M89.11,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M80.56,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M72.01,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M63.46,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M54.91,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M46.36,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M37.81,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M29.26,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M20.71,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M12.16,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M3.61,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3C/g%3E%3C/g%3E%3C/g%3E%3C/svg%3E");

有没有办法使用querySelector动态分配它？

document.querySelector('.element').style.backgroundImage= ...

Answer 1

您可以使用template literal克服引号问题。

document.querySelector('div').style.backgroundImage = `url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='95' height='6' viewBox='0 0 95 6'%3E%3Ctitle%3Escale mod%3C/title%3E%3Cg id='Layer_2' data-name='Layer 2'%3E%3Cg id='buttonbase'%3E%3Cg id='scale_mod' data-name='scale mod'%3E%3Cpath d='M95,6H0V5H95Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M94.953,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M86.4,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M77.853,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M69.3,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M60.753,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M52.2,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M43.653,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M35.1,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M26.553,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M18,5h-.9V3H18Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M9.452,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M.9,5H0V3H.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M89.11,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M80.56,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M72.01,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M63.46,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M54.91,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M46.36,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M37.81,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M29.26,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M20.71,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M12.16,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M3.61,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3C/g%3E%3C/g%3E%3C/g%3E%3C/svg%3E")`

div{width:100px;height:100px;}

<div></div>

<小时/>

您也可以转义引号。 (我只是将 " 替换为 \" )

document.querySelector('div').style.backgroundImage = "url(\"data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='95' height='6' viewBox='0 0 95 6'%3E%3Ctitle%3Escale mod%3C/title%3E%3Cg id='Layer_2' data-name='Layer 2'%3E%3Cg id='buttonbase'%3E%3Cg id='scale_mod' data-name='scale mod'%3E%3Cpath d='M95,6H0V5H95Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M94.953,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M86.4,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M77.853,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M69.3,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M60.753,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M52.2,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M43.653,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M35.1,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M26.553,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M18,5h-.9V3H18Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M9.452,5h-.9V3h.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M.9,5H0V3H.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M89.11,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M80.56,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M72.01,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M63.46,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M54.91,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M46.36,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M37.81,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M29.26,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M20.71,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M12.16,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3Cpath d='M3.61,0h.9V5h-.9Z' style='fill:%23c8c8c8'/%3E%3C/g%3E%3C/g%3E%3C/g%3E%3C/svg%3E\")"

div{width:100px;height:100px;}

<div></div>