The span[class~="sr-only"] selector will select any span element whose class includes sr-only. Create that selector, and give it a border property set to 0.
span[class~="sr-only"] {
border: 0;
}
Return true if the string in the first element of the array contains all of the letters of the string in the second element of the array. For example, ["hello", "Hello"], should return true because all of the letters in the second string are present in the first, ignoring case. The arguments ["hello", "hey"] should return false because the string hello does not contain a y. Lastly, ["Alien", "line"], should return true because all of the letters in line are present in Alien. function mutation ( arr ) { var temArr =[]; for ( let i = 0 ; i < arr [ 1 ]. length ; i ++) //要比较的是第二个数组的，所以放在外层，内层每次都要遍历第一个数组，让第二个数组中的字符去与每一个第一个数组中的字符比较，相等就push一个true，然后马上跳出内循环 { for ( let j = 0 ; j < arr [ 0 ]. length ; j ++) { if ( arr [ 1 ][ i ]. toUpperCase ()== arr [ 0 ][ j ]. toUpperCase ()) ...
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