摘要：function validatenull(val) { if (typeof val == 'boolean') { return false; } if (typeof val == 'number') { return false; } if (val instanceof Array) { 阅读全文

摘要：function loadStyle(url) { const link = document.createElement('link'); link.type = 'text/css'; link.rel = 'stylesheet'; link.href = url; const head = 阅读全文