Question

我想检查fileExt是否在avoidExt中，并在if...else声明中使用它。

var thisFile=$(this).val();                   //returns "file.jpg"
var fileExt = thisFile.replace(/^.*\./, '');  //return "jpg"
var avoidExt= new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);

Answer 1

您可以使用 RegExp.prototype.test()

＆＃13;

var thisFile = "file.jpg";
var fileExt = thisFile.replace(/^.*\./, ''); //return "jpg"
var avoidExt = new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);

console.log(avoidExt.test('.' + fileExt) ? 'fileExt is in' : 'fileExt is not in');

＆＃13;

更新： IF...ELSE格式

＆＃13;

var thisFile = "file.jpg";
var fileExt = thisFile.replace(/^.*\./, ''); //return "jpg"
var avoidExt = new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);

if (avoidExt.test('.' + fileExt))
  console.log('fileExt is in')
else
  console.log('fileExt is not in');

＆＃13;

或者无需使用正则表达式提取扩展名，您可以执行以下操作

＆＃13;

var thisFile = "file.jpg";
var avoidExt = new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);

console.log(avoidExt.test(thisFile) ? 'fileExt is in' : 'fileExt is not in');

＆＃13;

Answer 2

检查一下

＆＃13;

var thisFile=$(this).val();
var fileExt = thisFile.replace(/^.*\./, '');
var avoidExt= new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);
if(fileExt.test(avoidExt)){
    console.log("EXIST");  

}else{
    console.log("NOT EXIST");
  }

＆＃13;

Answer 3

也许这会有所帮助

var thisFile = $(this).val();
// var fileExt = thisFile.replace(/^.*\./, ''); doesn't need this line
var avoidExt= new RegExp(/(\.|\/)(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)$/i);
if(avoidExt.test(thisFile)){
    // exist
}else{
    // doesn't exist
}

Answer 4

没有必要创建RegExp对象，您可以使用正则表达式文字：

var fileExt = $(this).val().replace(/^.*\./, '');
var avoidExt = /(bat|exe|cmd|sh|php|pl|cgi|386|dll|com|torrent|js|app|jar|pif|vb|vbscript|wsf|asp|cer|csr|jsp|drv|sys|ade|adp|bas|chm|cpl|crt|csh|fxp|hlp|hta|inf|ins|isp|jse|htaccess|htpasswd|ksh|lnk|mdb|mde|mdt|mdw|msc|msi|msp|mst|ops|pcd|prg|reg|scr|sct|shb|shs|url|vbe|vbs|wsc|wsf|wsh)/i;

if(fileExt.text(avoidExt)){
  // exist
} else {
  // doesn't exist
}

jQuery检查字符串是否在RegExp中

4 个答案: