css-sprites 与内联/javascript
我正在做一个显示大量小图标（星星、旗帜、文件夹...）的网站，
现在我正在使用 CSS 精灵技术，它效果很好，但很难维护。
我正在考虑制作一个大的 .js 文件，其中所有图像都编码为 javascript 变量。然后以这种方式显示图像：
images.js
var myimage1 = 'data:image/png;base64,iVBORw0KGgoAAAANS...';
var myimage2 = 'data:image/png;base64,cB324CD64aB3Cme23...';
html code
<script type=text/javascript src=images.js></script>
....
<img src="javascript:myimage1">
<img src="javascript:myimage2">
我知道 .js 文件会更大，但它很容易维护，并且会被浏览器缓存。
这是好主意还是坏主意？这是跨浏览器吗？
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评论（4）
继续使用 CSS 精灵。如果您的用户禁用了 JavaScript，他们将看不到图像。
Stay with CSS sprites. If your users have JavaScript disabled, they won't see the images.
想一想，您愿意看到这个：
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAgAAAAIACAYAAAD0eNT6AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAIRRJREFUeNrs3U%2BMHNd9J%2FAaznANcSmTkHSgnZHCQ0QqOZFG7EtgZxAjlwWI6BRgb84e9rILOL5sDjmIPiywe7IDJMckvgXJScYAuQSOm174IgEieRI51qHJoSUCO2OTonYocbq7tqs5TQ9p%2Fpnuqa5Xr36fD9AQfPGwX3VVfd%2BrX%2F1eUZCbn44%2F5YI%2BFxfw7724wH%2FvT1vwb8jhc7El4%2FTr8ed0w%2BfL2w2M71pLzofS5ZFZHDEEQENOjj8%2FaPjv%2FaNhBwEASO%2FtvU8T3tkLAYAAALTADxq4MZ8bf%2F7SUIMAALTH6QZuzj8wzCAAAO3zTrG4gsDvFLMV5oEAANCgRRToNV1oCAIAwIyqWXrdBYFN1BeAAABQwypAXTfsKlB8x5CCAAC0X3Xzf6fG2T8gAACZqN4IONeC%2Fw8QAAAadpjZe52rCCAAADRorZi%2FN0CddQQgAAA0bJ7WvVVweNvQgQAA5Gued%2Fht9gMCANAB3ykO3sXvYtH89sIgAAAsyEFWAaob%2F3cNFQgAQHec25vdP4%2FCPxAAgA76bvHs5f2q6G%2FNEIEAAHTPswoCbfYDAgDQcU% 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或此：
请记住：
Just think, would you rather see this:
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAgAAAAIACAYAAAD0eNT6AAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAIRRJREFUeNrs3U%2BMHNd9J%2FAaznANcSmTkHSgnZHCQ0QqOZFG7EtgZxAjlwWI6BRgb84e9rILOL5sDjmIPiywe7IDJMckvgXJScYAuQSOm174IgEieRI51qHJoSUCO2OTonYocbq7tqs5TQ9p%2Fpnuqa5Xr36fD9AQfPGwX3VVfd%2BrX%2F1eUZCbn44%2F5YI%2BFxfw7724wH%2FvT1vwb8jhc7El4%2FTr8ed0w%2BfL2w2M71pLzofS5ZFZHDEEQENOjj8%2FaPjv%2FaNhBwEASO%2FtvU8T3tkLAYAAALTADxq4MZ8bf%2F7SUIMAALTH6QZuzj8wzCAAAO3zTrG4gsDvFLMV5oEAANCgRRToNV1oCAIAwIyqWXrdBYFN1BeAAABQwypAXTfsKlB8x5CCAAC0X3Xzf6fG2T8gAACZqN4IONeC%2Fw8QAAAadpjZe52rCCAAADRorZi%2FN0CddQQgAAA0bJ7WvVVweNvQgQAA5Gued%2Fht9gMCANAB3ykO3sXvYtH89sIgAAAsyEFWAaob%2F3cNFQgAQHec25vdP4%2FCPxAAgA76bvHs5f2q6G%2FNEIEAAHTPswoCbfYDAgDQcU%2Bb6f9lofAPBACg8%2Fa%2F5lfd%2BHX8g5qsGAL2%2Bd2i%2Fmerv2tYOYTqpn9x7%2BOdfyC0n44%2Fpc%2Fk89NEx2Btwd9rLdH3utjiY93mf9tai8YYDswjACAHlv5BAAAABAAAQAAAAAQAAEAAAAAEAAAQAAAAAQAAEAAAAAEAABAAAJ6rn%2FBv3xl%2FrjgEIAAAzfve3o042t8GAQAI7c7ejbhpvfHnR4YfBAAgnR%2Ft3ZCbDB1%2FYdhBAADS%2B4uiueX47xdpaw9AAADY09%2B7MS9ab%2Fz5oeEGAQBojx8Wi38U8D3DDAIA0D6LvEFXKwxe%2BwMBAGihK8ViHgVU%2F78XDS8IAEB7XVzATF3VPwgAQAbqvGH%2FsLD0DwIAc6mWZJdq%2FnzfsPIcV4p6qvX7fmsTZeLPRYdAAACYJXj2a1hJ0O4XBAAgI4ft2NfEa4UgAAAsQK%2BY71FAFR4s%2FYMAAGTs%2B8Xsy%2FiW%2FkEAADI366OAd%2Fc%2BgAAAZO6gN3U7%2FYEAAHTMQZb1v1dY%2BgcBAOiUO8Xz9wrojT8%2FMkwgAADd86Pi6a%2F2WfoHAQDouKc9CqijaRAgAAAt1i8ef8e%2FWhH4oWEBAQDovv1d%2Fr5nOKA%2BK4YAaLnqxn%2B6sNMfCABAKFfc%2FKF%2BHgEAgAAAAAgAAIAAAAAIAACAAAAACAAAgAAAALTHkiHIzrnx5%2BSC%2Fr%2F7Rf0brZze%2ByxCtVFMigYxJ%2FeOw6JcKdLsdb%2FIY5XqOzVx3szy3RY5xm2wiGsIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAADQWkuG4GBuXTizNv7PmpEAaLXe6vpGzzC82IohOLDq5v%2BOYQBofwgwBC92xBD4QQG4VgsAAIAAwD53DAGAa3VXKAKcwa0LZ0qjANBeq%2Bsb7mtWAAAAAaAelpYAXKMFgICuGAIA12gBAAAQAALoGwIA12gBIJ4bhgDANVoAAAAEgAAUmAC4RgsAAXnFBMA1WgAAAPKkZeKMtAMGaCdtgK0AAAACAAABeP4vACxczxAAtI43AAQAAEAAqJ9lJgDXZgEgoKuGAMC1WQAAAASAAPqGAMC1WQDwIwPAtVkAAAAEgC7yrimAa3P29E2eg%2F0AANrFPgBWAACAA1gxBHPpjT9rhoHcLf8HkybqUw7LYjRMdk1GAAAO6tgrFgGpz%2F07o3EA8IQ0F85%2BAOpZARgl%2B9PaAAsAjblkCABaQxtgAQCAVIYPLP8LAN1nuQnANVkACEjDCYB9yrSTf9dkAQCAFEa7lv8FgBj6hgDANVkACGZ1fcOPDWCflI8AXJMFAAASGe0aAwEgDkUnAK7FAkBAXjsBmK4ApGsB7FosAACQLgAYAwEgDu2AAVyLBQAAAq8ADPQBEAAACMdOgAJAJD1DAJCctwAEAABSsAugABCNZScA1%2BJsLRmC%2Bd26cEbsJWsvn1o2CBza4IuyuP%2FrNEUAq%2Bsb7mNWAABIQRtgASCiviEAcA0WAPz4AMIp020F6BosAACQytAjAAEgIO%2BfArgGCwAB3TUEQHRlup0AXYMFAABSsROgABCR5SeAdHqGQABIRQcqIPbs3y6AAgAA8STcBdAk7JC0UDwk7YDJmVbAHFa1EdDOr7QBtgIAQLAAYAwEgLgsQQG49goAAXkTAAgrYRtg114BAIBUtAEWACLrGwIA114BIJ4bhgCIKt0TANdeAQCAZEa73oQWAOJSiALg2isABORVFCDm7D%2FtJkCuvQIAACkk3AYYAaAVLEMBNGx1faNnFASA1D9Cy1BASMOBMRAAAIgn3U6AJl4CQGv0DAFAYzx6rcGKIWAeR%2F%2Fqbw1C7if%2F8krxH185biAyN9z8sPj8n%2F9Xkr89eKAIUAAg3HLUkdffLIpjbh45Wz56tFg%2BccJAZG609UvXXOa7jhuCWlwNd9HZ%2FIWjDm04F7fTBYCEbYCvOvICAACpwoc2wAIA8XalKrc%2BcdShBYab11xzEQD8GBu0ddtRhza4fy%2FNJCDt5F8AEAAASMHyvwDAQ%2BHeSR3dVAQIbTC4%2Fp5rLgJAKiHbASdadgRaMglIuBOgFuwCAACJlENjIAAwFWpJyiMASG%2B48X7Er91z5AWAtom1JLXzmSMOkcPHQBGgAABAEuXOp%2Bn%2Btp0ABQAeuRTtC4%2BuX3bUIeUsPGYTIG2ABQAAkoUPOwEKADwSb1lqx6uAkFLKjYBcawUAfiNcY4ry5keOOqQ8B7c%2FTvN3007%2BNQESAABIQRtgAYDH9cPNPuwICEkNNz90rUUASG11fSNeANgWACDpObgTbyfAiNdaAQCAVhjtGgMBgCeFSqbaAUM6QdsAKwAUAASAVtAOGGKuAAyTPQPwCqAAABBbyjbAIzsBCgD8loC9ADwGgBSCtgG%2B5MgLAG11N1wAuO8xAEQzshOgAABAovCdsBV3wp0AEQBaqxfuInTNjoCQZBZ%2BK%2BQjgJ4jLwAAkIBdAAUAni7cKyqlHQEhzQrAlp0AEQBaY3V9I95bAJveAoAkASDRVsCJ2wBrBCQAAJAkeGgDLADwTP1QKwBbtx1xaFjQHgB9R14A8CNtVQCwIyA07n7CVwDTPQMQAAQAAFIZegQgACClWgWANAbX34v4tRUACgCtdyNcANhWBwBhzvd0OwHeNfoCAEDsm3DC%2Fht2AhQAeDY7AgKLvQlrA4wA0ErxOlXt2BEQQgQPuwAKAAAkvBEnagNsF0ABgOdYXd%2FohbsYXf%2FAgYcmz7ntePsARLy2CgAAtMLwgTEQAHiRUHUApRoAMPt3TRUAmAj1JoC3AKDB823743R%2FO10bYE2AFmDFEBB6NnX9ctjvPlxeKYavHPcjyO24bX6Y7m9rAywA8ELhlquqdsBLr30lu3%2F37v%2F%2B72F%2FpNW1fOXUsrOVHPQNQf08AliMq%2BECgHbA0P3zPF0bgBtGXwCAWi298aZBgAMa7WoEJADwIv1wM4NMdwRcOuYZOGRAEaAAIAC01pZHANDp2X%2FaTYC8BigAQM0nwNmvGQQ4gITbACMAZCXcctVILwBgQbQBFgBy%2BrHGW666f8%2BBhw4bDoyBAAAdsvTWeYMAB2EnQAGAA%2BuFujZcu%2ByIA66lAgBksgLwktcA4SAGDxQBCgAcVLw6gAx3BdQICFxLBQDqFq4d8GjTmwDQVQnbAF81%2BgIALGYVIMNNjKDxgK8NsADAgYXcETDPAHDKrxXaq28IBIDcxOtdrR0wdDPcp538CwACACxoBeB1hYDwPJb%2FBQCk1ufPErLdEfBlv1ZoLzsBCgB5WV3fiBcAtj9x4KGLKwAJdwIM2VpdAICGVgC0A4bnh%2FuhMRAAmFWopSs7AgI16xkCASBXsZauMuwECLzYcKAIUACALp4EZz0CgOcp7QQoADCzS9G%2B8Oi6XQEB11ABAHJxzK6A8CxDOwEKAMws4I6A9%2FI8EewKCK6hAgA1CtfAorz5kaMOXTqn007%2BNQESAGCxll61IyA8jTbAAgDzibcjYKaPAGwJDK3UNwQCQJZW1zfiPQLY1AwIOnVOJ1wAiNhSXQCAplcA3vg9gwBPMdo1BgIA8wqVYMut23n%2Bw%2B0ICG2jAFAAEADyCgB2BIROrQAMkz0D8AqgAAANnAjaAcMzAoAxEACYV8BeAAoBgUPTBlgAyN7dcAHgvl0BoTMrAHYCFACg8yfDWx4DwG8FejsBCgDMrRfugnHNjoCAa6cAALl4yauAsJ9dAAUAmG0FwI6AwOF5DVAAyNvq%2BkYvXADQDhi6cS6nbQOsEZAAAA157ZQxgH20ARYAOLxQS1nlTp6vAdoREFqjbwgEgK4ItZSlERB05FxO9wxAABAAoMGT4XVFgLDf0CMAAQBpduaZQ46bAh077pcK7aAAsAErhqARN8IFgO3bWT5T%2F9I%2F%2FDzMMTp69Gjx5RMnnJ0t98X6300%2BSc7jdDsB3nXkrQAAkIidAAUADs%2BOgMBchhvvR%2FzaPUdeAOiKeB2tduwICFnP%2Fu0CKAAAkE6582mav2sXQAGAw4vYDnh0%2FQMHHmow3LzmmokAAEBDweOBMRAAYA6lGgA4tNH2LyN%2BbbsACgCd0wsVALwFAIc%2Fj7Y%2FTve307UB1gRIAAAgFW2ABQDq41VAYLab8OaHEb9235EXALrmarQvPNr0GAAOo9y5l%2B5vp2sDcMORFwAASBXgdzUCEgCoSz%2Fc7CXHHQGhRYK2AVYEKAAIANnbuu2oQ46z%2F7SbAHkNUAAAiC1ZG%2BCh5X8BgDqFW9Ya6QUAh6INMAJAN37U8Za17t9z4CHH4DEwBgIAAEkkbQNsJ0ABgNr1Ql3Arl12xGFOKdsAu0YKAAAENHigCFAAgMPSDhjmMtqyEyACQJdcCncR0w4Y5jt3Ym4FfNWRFwAASGToEYAAQO0C7gjoVUCY6yYcsAdAYSdAAaDDwjUDKm9%2B5KjDPBL10SjTTv4FAAEAgBTsAigAIN3WM5uwIyDMZXD9vYhf206AAkA3ra5vxAsA2wIAZLUCkHAnwJAt0wUAAB4F54TFs%2BXQ%2BAsALEqoJS47AsIc582tkG8A9Bx5AaDrYi1x6QQIWRkOFAEKAACkWQFI2Aa4tBOgAMDChKtyHV23KyDMdM7EbAN8yZEXALruriEA2kobYAEAACsATfIKoADQeb1oX7i85hEAzHTObH8c8WtrAiQAAJCC5X8BgMUKt8xV2hEQZrsRb34Y8Wv3HXkBoNNW1zfi7Qi4qRkQ5BCaU%2B4EGLFVugAAQCuMdo2BAMCihUq65dZtRxwOaLjxfsSvrQBQABAAuhkA7AgIWawADJM9A%2FAKoAAAEFu582nCAGD8BQAWLV4hoF0B4UCGmyF3AtQGOIEVQ5BEuHbA1X4AS%2FftDNiqG83ySjF85Xhnv9%2FSq18tjrz6Ow70LOepnQAFAKjb4J%2F%2BxiC0TFXwvXJqubPf70sX%2Ftvkk91NeNtOgDTDI4A0VLwCT78Jx2wD3HPkBYAoVLzCoi9ulv9nog2wAADQjYvba3kGgNGWnQARADprdX2jZxSApwaAgFsBR2yRLgAALOritvqWQZjB8IExEABoiiUvWKClYy%2FndxOO2QOg79cqAERjyQt43P10W2eX6bYCFAAEAIB6rJz9hkGY0dBOgAIAUi%2BQxuD6exG%2FttVQASCcG4YAFuSll43BjMp0OwHeNfoCAEAtll%2FP8w2AciddDYCdAAUAmtM3BMBjN%2BFbId8C6DnyAoAAANRzYdMGeLbgYRdAAQCgExc2bYBnYhdAAYBmqXwFHg8AMdsA9xx5ASDaj14nQFiQpVe%2FahBmoA2wAADQjQtbhjUAEWf%2FhZboAkBgPUMAVMrtjyN%2BbY9CBQCAeuTaAyClwQNvAQgANM3yF9Rs6diXs%2Fx3Dzc%2FjHi4%2Bn6xAkBUVw0BUEnZBTDdRoBaoqe0Ygho9Af3n79bLL3xZnb%2F7sE%2F%2FU1R3vyFA5iB5TNfNwgzGu16BCAA0LR%2BuG987Hhx5Oz57P7ZS%2BN%2Ft0skizTceD%2Fi11YEmJBHAAJAs7ZuO%2BosOKzZCXCm2X%2FaTYDUQQkA0PIT5ezXDEImll%2F%2F%2FSz%2F3eXOp2n%2B7tDalgCAFYAmZhueo8NTDTfj7QSoDbAAENb4xx8uABT37znwLJQ2wDMGj4ExEACAZ99U3jpvEHK5qGkDPOMf95sRAEglVBXs6NplRxyeELQNcM%2BRFwCiUwWbwwrAS8cNQga0AZ6dNsACAPC8AJBh86KQxynTNsCjLTsBIgBEdCnaFx5d9xgAHjsnYm4FrBW6AACZzC5f%2B4pBaPsFbdUjgFkNPQIQAEgm3jLYTp6vAi69dsqvte3HKNMugBF7ABR2AhQAiNcLu7z5kaMO%2ByXqj1GmnfwLAAIAZDK7fF0hYNutnP2GQZiBXQAFANIKl4LLrU%2FyDAA2mWFBBtffi%2Fi17QQoAMQWsR1wuf2JA89ivCSkzbQCkHAnwPG1z2uAAgBksgKgHXDr5dgIqExYFFsO%2FWYEAFILtQpgR0DYdz7cCvkGQM%2BRFwAIGACKnc8cceq%2FmGW4CVBqw4EiQAEAePHJctYjgFYfn9fyDAAp2wCXdgIUAEguXDWsdsCwdy7EbAN8yZEXAHjoriHIxDG7Arb2YqYN8My0ARYAgIOeMHYFbK1c%2BzQEXQHwCqAAwJ5etC9cXvMIACbnwvbHEb%2B2JkACAGQ2y3zVjoBtpQ3wbCz%2FIwC0Q7jlsDLbHQEFAGq%2BEW9%2BGPFr9x15AYBi0hIz3o6Am5oBQcownHInwIgt0AUAyNzSG79nEFpq%2BczXDcIMRrvGQACgLUI9Bii3buf5D7cjIDUabrwf8WsrABQAiHxS5LolMO1kq%2BY5VgCGyZ4BeAVQAIAMTxjtgFtp%2BfXfzzMI73yaMAD43QgAtEU%2F2hcu7QpIcMPNkDsBagMsAPCEG%2BECwH27AlKPpVe%2FahBmXQGwE6AAYAhgxpPmLY8BWndMMt0KOGUbYDsBIgC0R7xeANoBE1zQNsA9R74dVgxBa6iMzSU1%2F9F%2Fejh7E2BaMfNfPvv1YuXctw3GDLQBRgCAOSyPA8DyNARc%2FtkkCIyuX1bU2NRFa3yzXxnf9JfPfKNYfj3vLYBHW3YCJJ0lQ9Aety6cCRXLq2fpR%2F%2FH33bnC%2B18VgzHgaCcBoIMeh28fGq5%2FYFrfJN%2FeNP%2FRue6%2FX36X%2F8g2QrAzq%2FSFAGsrm%2B471gBgI45dvzhysDe6kC1IlAFgYcrBB9MAgIHCIZ7y%2FpHxzf9apavyc8iAoAxQABom2pp7GSUL1t2%2FIa49MabxXL1%2BdM%2Fn%2FzvyarAOAxMVgk8LvjNOI1v8NWNfnLDH9%2F4c63on%2FkmHLMHQN8vXgDg6ao3AdbCBIBgN8FJF8HxZ%2FnP%2FstkNaBaFRh98H%2ByeVxQ64Vnbzm%2FWtrP%2FTn%2B3O6n2xK7TLcVoAAgAEBwx44XR85%2Fa%2FKZXJDHAWDyuGASCLr3uKC6yVez%2FGnxnmX9xKsPdgJEAGidcNWx1Y1v6bWvhD%2Fw1RgsV5%2F99QOXH4aBHF83rG7wk8K9qlI%2F0LL%2BLAbX34v4te0EKADwDFfHn7dDBYDt2wLA026g0%2FqBYt%2Fjgpa%2Fblgt66%2Bc%2B5NOvJ7X%2BfMu3U6Ad42%2BAAAc1DMeF0wLClM9Lpgu6x89%2F%2B3OvZ7XyE14J10NgJ0AEQDapx%2FuIljNZm2xO9vqwN7jgup1w5Xirx9%2F3bAKBAvyqOte9Sz%2F3Lc9xz%2FsTfhWyLcAeo68AIAA8JB34w8fCJ7yuuHog58d%2BnHB9PW8lb1Wu57jdyR42AUQAQC6qXrd8Mh0VWXG7oRd7rrXuhtxojbAdgFEAGincBWyVXHbpNCNxXiyO2FVP1C9XbDXnfDIq6881lvfsn6Dv%2F3tePsArK5v9Bx5AYCnnxx3bl04YyBYmEn9wJ%2F%2B%2BeRz9OjR4viJEwYlGG2AmTpiCADM%2FhtgF0ABgBfohboQZtjkBg6r3P444tfWBEgAACCVwQNvASAAtFW8ZTKvAhLMcPPDiF%2B778gLADzf1WhfeLRpa1xiSdkFMN1GgMUNR14AACBV4N71CAABoK1C7ggIkQw33o%2F4tRUBCgA4SZ6wddtRhyZm%2F2k3AfIaoAAAEFu582mavzu0%2FI8A0Gb9cLOSm4oAiWW4GW8nQG2ABQBefJKECwDF%2FXsOPDQRPAbGAAEAIImkbYDtBIgA0HqhCgG1AyaSoG2Ae468AMDBqJYFaqcNMAIAQCKjLTsBIgDwbJfCXRSvewxAkN96zK2ArzryAgAAiQw9AkAAoHV2vApIkJtwwB4AhZ0ABQAOrBftC5c3P3LUiSFR34sy7eRfABAAAEjBLoAIAHkIVzGrHTARlDv3isH19yJ%2BdTsBttCSIWinWxfOhIzrR85%2Fqzjy1vniyNnzxdIbb%2FohLNDRo0eLEydOGIgFq7b%2B3b38k%2FF%2F30v6%2FH%2F3fll8fjdNK8DV9Q33mhZaMQS0aiXg8s8mn0k6fe0rkyBw5GvfHP%2F3a0Vx7LgBov2%2F4e1fFoMrPxnP9N%2Bf3PTLlhS4lkPHBgEgF%2F3x53TkASi3PimG1efn%2F%2FowELzxZrFcrRCc%2F6bVAdrzOx3f4Ksb%2Fe74pj8c3%2FSDvuf%2FPJb%2FBQAEgENeaG%2F%2BohhUtQI%2F%2FvvJakC1KvBwdeD8ZLUAmlIt5Vez%2FGp5P5dn%2BsNBsqeKugAKAFCjnc8ef1zwxpsPHxdU9QPnv2V8qFU1q69m94PxTL%2B68ZcZ9q0o7QSIAJCNatlszTAcfHVgWH3%2B7V8m%2F3saBBQTMveMuSXFex1wyRAIAMzmriE4xIzt2uVH2wxPiwmXxqGgqiFQTMizZvnT4r3qv50LNNoAIwAQbnVgr5iw%2BPm%2FFoPifz4qJlzae92QoL8LxXtNUQMgADCj3vjzjmFYwIX%2FUTFhoZgwmByL9zrAWwACALTQk8WE1eOC899UTNgR0%2BK9ySy%2FRe%2FkNx58LP8jAMALVgeqxwX%2F9i%2BKCTO2vwmP4r1W6BuCdtKescWitgNu7cnSsWLCrrQCrm7y1c2%2Bq8V7tYSiL8ri%2Fq%2B1AcYKAMy%2FOqCYMP1xULw3s9GuMUAAyE1VPXvSMLT0RqSYsNFZ%2FmRpv7rpW9bPiQJAAYBDnDxrhiEDignrnbEq3qt3PIfaACMAQDOrA4oJZ7a%2FCY9l%2FboDgDFAAMhN3xB05AKsM%2BFveVS8d%2BXfvZPfXR4BCADM6YYh6OjqQMBiwmoZfzLLr17PU7zXbABNtxOgluYCAPDMG2OHiwmnHfcU7yX%2BjdkJEAEgO5bPosm8mFDxHk%2FoGQIBgPmooI0%2Bc2t5MeH0nXzFe%2B2lDTACAHRAG4oJFe9hEtMNWjS22K0LZ6omQL82EhzoZJ6xmPCgrYD3F%2B9V%2F7Wsn98KwM6vtAFGAMgxBFi%2FY3YHKCZ8XgCoivd2L%2F%2FEhjod8OCzsvjiMwGA3%2BYRAHTRjMWE1bP7%2FbvomeVTg74hEAA4nF6hHTCH9LRiwvIP%2FrD4%2FKWB4r2uH%2Fsy2SKiACAAAG1TFRI%2BqD6nlg1Gxw3tBMgzHDEEraeKFsiRPiYCAId01RAA8yqH2gAjAACEYydABIB89Q0BkCGPAAQABAAgyex%2FkLSNiPolAQCAFOwCiACQN8toQHZW1zd6RkEA4HAnkWU0YC7DB8YAAQCA5pi4CADUxGMAwDULAUCaBnixwQObiSIAANCcviEQAKjHJUMAHFT1%2Fv%2BDnTJlG%2BAbjkL72Q0QIHPVjr%2FDB2Ux%2BLyc%2FFf7XwSA7lADADymutFXr%2FntfjG%2B4e%2B27lm%2FIkABACcTUIdqVj%2BZ5X%2FxcJbf8i5%2FJi0CAADzmt7sq6V9y%2FoIADH1DQEEmOUPxjf7B8WjZ%2FkZs2qZgSVDkIdbF854oZfavXxq2SAkVBXvTW%2F2XSreW13fcG%2BxAgDAfi0v3kMAoIWqJbVzhgHyklnxXh16jroAQL1U1UIGpu%2FkK95DAADo%2Biy%2FO8V7JisCAC1UPQJYMwzQjln%2B9GZfLe0HWNafxVVDIABQr7uGANKZ3uyrmb7iPQQAgI6qnt1PC%2FeCFO%2FVpW8I8mA3wHz0DAEszmRZf3zD%2F%2BLeqPh%2F%2F3c4%2BXzx6Wiy1O%2FmLwBYAQDo0ixf8R4CABlQWQuHveEP972ip3hvUbQBzoR2jRnRDpi6RWgFrHivWdoAWwEASDbL37%2BLHiAAdEF%2F%2FDltGOA3pp33ps%2Fxdd5LyvK%2FAIAAAAuc5VfFe5%2BPZ%2FoPFO%2B1jFolAQCgxhu%2B4j0QAKwAQAyK97J0yRAIACzGDUNAl2f5ivegOV7XyMytC2feHv%2Fnj4uHGwOdMyIcRsrXABXvdUZvb%2Bb%2F7ur6hiJAAYCGwsDpvSDwZ3v%2FPWlUaHMAmBbv7Y5n%2Bpb1s9Xfu%2Bn%2FuPrv%2BKav8E8AoAWBoFoReHsvEFgdIHkAmBbvTZf2Fe9l6c4Ts%2Fy%2BIREAaHcYOPnE6sBpo0ITAeDRc3zFezm7Mp3lj2%2F4PcMhAJD%2F6kAVBP54b5UAagkA0w11FO9lP8t%2Fd98s37K%2BAECHA4FiQuYKAIr3OmMywy8ePsdXvCcAEDQMnC4UEwoAL5rlK97LXX%2FfLF%2FxHgIATw0E02LC6QoBwQKA4r1OULyHAMChwoBiwiABYH8THsv62VK8hwDAwgLB6X2rA4oJM%2FelLx959CyfLPWfmOVb1kcAoLFAsH91QDEhLN5khl8o3kMAoGWrA2v7VgcUE0I9s%2FxJ8d74hv%2Bu4UAAIIdAoJgQZnfniVl%2B35AgAJBzGFBMCM92Zd8Nv2c4EADociA4XSgmJK5%2BoXgPAQAUExJCr1C8hwAAL1wdWCsUE5K36Tv5ivcQAGDOQKCYkBwo3kMAgAWGAcWEtG2WX93w37WsjwAAzQaC04ViQprTf2KWr3gPAQBaEgj2rw4oJqQO%2B3fQM8tHAIBMVgfWCsWEzEbxHgIAdCwQKCbkaRTvIQBAoDCgmDC2yQy%2FULyHAADhA8HpQjFhl%2FULxXsgAMABAsH%2B1QHFhHl6d98sv284QACAeVYH1grFhG03Ld77sQ11QACARQQCxYTtcKd4%2FBU9s3wQAKCxMHDyidWB00ZloXqF4j0QAKCFgeD0E6sDHhccTr9QvAcCAGQYCKoQoJhwNor3QACAToWBk8XjrxpaHXhI8R4IABAqEJwrHm9GFMWdJ2b5lvVBAIDQqwNrRXeLCScz%2FMKGOiAAAM8NBKeLvIsJ%2B8Xjr%2BiZ5YMAAMwRCKoQ0OZiwumGOor3QAAAFhQG2lJMqHgPBAAgYSBoqphQ8R4IAECLVwfWivqKCScz%2FELxHggAQFaB4HQxWzFhfzrLH9%2Fw3zWCIAAA3QgEVQjYX0x454lZft8oQQz%2FX4ABAK6DJElxTemaAAAAAElFTkSuQmCC
or this:
Remember that:
如果您决定坚持使用 CSS sprites（例如，因为您需要 IE6/7 支持，或者担心无 JS 回退），以下几点可能会有所帮助维护：
根据形状将精灵组织成单独的图像。例如，将所有 20x20 徽章放入同一个精灵中，将所有 30x15 文件夹放入另一个精灵中。 （是的，您将有更多的 HTTP 请求，但 HTTP 性能是需要考虑的众多因素之一。）这使得 CSS 的计算更加变得更加简单。您可以将精灵设置为单列、双列（这对于翻转效果很好）或任何保持最干净的方式。处理大的、不规则的精灵是一件痛苦的事！
采用低影响模式来添加新图像。例如，始终将新项目添加到底部，这样您就无需为新图像上方的图像重新计算 CSS。 （只有当您按照我的第一点组织精灵时，这才有意义。）
如果您不再打算使用精灵，只需将其清空即可。在原来的位置留下空格或灰色的 x 或其他东西。然后，当您有时间并且需要清理一堆已删除的图像时，请一次性完成所有这些操作。 （再次强调，如果您非常关心性能，您可能不喜欢在这些文件中保留任何空闲字节的想法...）
只是一些想法。
If you decide to stick with CSS sprites (because you require IE6/7 support, for instance, or are concerned about no-JS fallback), a few things that might help with maintenance:
Organize sprites into separate images based on shape. For instance, put all of your 20x20 badges in the same sprite, all your 30x15 folders in another sprite. (Yes, you will have more HTTP requests, but HTTP performance is one of many factors to consider.) This makes calculating CSS much simpler. You can set the sprites up as single columns, double columns (which is nice for roll-over effects) or whatever keeps things cleanest. Dealing with a large, irregular sprite is a pain!
Have a low-impact pattern for adding new imagery. Always add new items to the bottom, for instance, so you don't need to recalculate CSS for imagery above the new image. (This really only makes sense if you organize sprites per my first point.)
If you are no longer going to use sprites, just blank them out. Leave white spaces or gray x's or something in their old spot. Then when you have time and a bunch of removed images to clean out, do them all at once. (Again, if you're crazy concerned about performance, you might not like the idea of leaving any spare bytes in these files...)
Just a few thoughts.
我想说这是一个坏主意，因为如果用户禁用了 JavaScript，您的任何图像都不会显示。雅虎！估计大约 2% 的访问者不使用 JavaScript （来源）
I would say that it's a bad idea as none of your images would show up if the user has JavaScript disabled. Yahoo! reckon that about 2% of their visitors don't use JavaScript (source)