loadjs
Version:
Tiny async loader for modern browsers
1 lines • 1.83 kB
JavaScript
loadjs=function(){var h=function(){},o={},c={},f={};function u(e,n){if(e){var t=f[e];if(c[e]=n,t)for(;t.length;)t[0](e,n),t.splice(0,1)}}function l(e,n){e.call&&(e={success:e}),n.length?(e.error||h)(n):(e.success||h)(e)}function p(t,r,i,s){var o,e,u,n=document,c=i.async,f=(i.numRetries||0)+1,l=i.before||h,a=t.replace(/[\?|#].*$/,""),d=t.replace(/^(css|img|module|nomodule)!/,"");if(s=s||0,/(^css!|\.css$)/.test(a))(u=n.createElement("link")).rel="stylesheet",u.href=d,(o="hideFocus"in u)&&u.relList&&(o=0,u.rel="preload",u.as="style");else if(/(^img!|\.(png|gif|jpg|svg|webp)$)/.test(a))(u=n.createElement("img")).src=d;else if((u=n.createElement("script")).src=d,u.async=void 0===c||c,e="noModule"in u,/^module!/.test(a)){if(!e)return r(t,"l");u.type="module"}else if(/^nomodule!/.test(a)&&e)return r(t,"l");!(u.onload=u.onerror=u.onbeforeload=function(e){var n=e.type[0];if(o)try{u.sheet.cssText.length||(n="e")}catch(e){18!=e.code&&(n="e")}if("e"==n){if((s+=1)<f)return p(t,r,i,s)}else if("preload"==u.rel&&"style"==u.as)return u.rel="stylesheet";r(t,n,e.defaultPrevented)})!==l(t,u)&&n.head.appendChild(u)}function t(e,n,t){var r,i;if(n&&n.trim&&(r=n),i=(r?t:n)||{},r){if(r in o)throw"LoadJS";o[r]=!0}function s(n,t){!function(e,r,n){var t,i,s=(e=e.push?e:[e]).length,o=s,u=[];for(t=function(e,n,t){if("e"==n&&u.push(e),"b"==n){if(!t)return;u.push(e)}--s||r(u)},i=0;i<o;i++)p(e[i],t,n)}(e,function(e){l(i,e),n&&l({success:n,error:t},e),u(r,e)},i)}if(i.returnPromise)return new Promise(s);s()}return t.ready=function(e,n){return function(e,t){e=e.push?e:[e];var n,r,i,s=[],o=e.length,u=o;for(n=function(e,n){n.length&&s.push(e),--u||t(s)};o--;)r=e[o],(i=c[r])?n(r,i):(f[r]=f[r]||[]).push(n)}(e,function(e){l(n,e)}),t},t.done=function(e){u(e,[])},t.reset=function(){o={},c={},f={}},t.isDefined=function(e){return e in o},t}();