sprintf.jquery.js

( function ( $ ){

$.sprintf = ( function (){
    var args = arguments;
    var str = args[0];
    var mode = 1;
    var index = 0;
    var result = '';
    var num = 0;
    var precisionMode = false;
    var settings;
    for ( var i = 0; i < str.length; i++ ){
        var chr = str[i];
        if ( mode & 1 ){
            if ( chr == '%' ){
                index++;
                precisionMode = false;
                settings = {
                    precision: 0,
                    width: 0,
                    positiveHasSign: false,
                    padChar: ' ',
                    leftJustify: false,
                    index: index
                    };
                mode = 6;
                continue;
            } else {
                result += chr;
            }
        }
        if ( mode & 2 ){
            if ( chr == '%' || ( 'a' <= chr && chr <= 'z' ) || ( 'A' <= chr && chr <= 'Z' )){
                if ( num )
                    settings[ precisionMode ? 'precision' : 'width' ] = num;
                var value = args[ settings.index ];
                if ( chr == '%' )
                    value = '%';
                else if ( chr == 'b' )
                    value = parseInt( value, 10 ).toString(2);
                else if ( chr == 'c' )
                    value = String.fromCharCode( value | 0 );
                else if ( chr == 'd' || chr == 'i')
                    value = value |0;
                else if (chr == 'e' )
                    value = settings.precision ? ( + value ).toExponential( settings.precision ) : ( + value ).toExponential();
                else if ( chr == 'f' )
                    value = settings.precision ? ( + value ).toFixed( settings.precision ) : ( + value );
                else if ( chr == 'g' )
                    value = settings.precision ? ( + value ).toPrecision( settings.precision ) : ( + value )
                else if ( chr == 'o' )
                    value = ( value | 0 ).toString( 8 );
                else if ( chr == 's' )
                    value = settings.precision ? ( value + '' ).substring( 0, settings.precision ) : value;
                else if ( chr == 'u' )
                    value = ( value | 0 ) >>> 0;
                else if ( chr == 'x' )
                    value = ( value | 0 ).toString( 16 );
                else if ( chr == 'X' )
                    value = ( value | 0 ).toString( 16 ).toUpperCase();
                value += '';
                if ( settings.positiveHasSign && value > 0 )
                    value = '+' + value;
                while ( value.length < settings.width )
                    if ( settings.leftJustify )
                        value += settings.padChar;
                    else
                        value = settings.padChar + value;
                result += value;
                mode = 1;
                continue;
            } else if ( chr == '.' ){
                settings.width = num;
                num = 0;
                precisionMode = true;
                mode = 6;
                continue;
            } else if ( chr == '$' ){
                settings.index = num;
                num = 0;
                mode = 6;
                continue;
            }
        }
        if ( mode & 4 ){
            if ( chr == '+' ){
                settings.positiveHasSign = true;
            } else if ( chr == '-' ){
                settings.leftJustify = true;
            } else if ( chr == ' ' || chr == '0'){
                settings.padChar = chr;
            } else if ( '1' <= chr && chr <= '9' ){
                num = +chr;
                mode = 18;
                continue;
            } else if ( chr = "'" ){
                mode = 8;
                continue;
            }
        }
        if ( mode & 8 ){
            settings.padChar = chr;
            mode = 6;
            continue;
        }
        if ( mode & 16 )
            if ( '0' <= chr && chr <= '9' )
                num = 10 * num + +chr;
    }
    return result;
} );

} )( jQuery );

/*
<script src=jquery.js></script>
<script src=sprintf.jquery.js></script>
<script>
// There are 5 monkeys in the tree.
console.log( $.sprintf( 'There are %d monkeys in the %s.', 5, 'tree' ) );
// The 5 contains 0 monkeys.
console.log( $.sprintf( 'The %s contains %d monkeys.', 5, 'tree' ) );
// The tree contains 5 monkeys.
console.log( $.sprintf( 'The %2$s contains %1$d monkeys.', 5, 'tree' ) );
// The tree contains 5 monkeys. That's a nice tree full of 5 monkeys.
console.log( $.sprintf( 'The %2$s contains %1$d monkeys. That\'s a nice %2$s full of %1$d monkeys.', 5, 'tree' ) );
//......123
console.log( $.sprintf( "%'.9d", 123 ) );
// 000000123
console.log( $.sprintf( "%'.09d", 123 ) );
// The tree contains 0005 monkeys.
console.log( $.sprintf( 'The %2$s contains %1$04d monkeys.', 5, 'tree' ) );
// 2020-02-12
console.log( $.sprintf( '%04d-%02d-%02d', 2020, 2, 12 ) );
// 123.10
console.log( $.sprintf( '%01.2f', 123.1 ) );
// 3.625e+8
console.log( $.sprintf( '%.3e', 362525200 ) );
</script>
*/