jquery/jquery

View on GitHub
src/attributes/val.js

Summary

Maintainability
B
5 hrs
Test Coverage
import jQuery from "../core.js";
import stripAndCollapse from "../core/stripAndCollapse.js";
import nodeName from "../core/nodeName.js";

import "../core/init.js";

var rreturn = /\r/g;

jQuery.fn.extend( {
    val: function( value ) {
        var hooks, ret, valueIsFunction,
            elem = this[ 0 ];

        if ( !arguments.length ) {
            if ( elem ) {
                hooks = jQuery.valHooks[ elem.type ] ||
                    jQuery.valHooks[ elem.nodeName.toLowerCase() ];

                if ( hooks &&
                    "get" in hooks &&
                    ( ret = hooks.get( elem, "value" ) ) !== undefined
                ) {
                    return ret;
                }

                ret = elem.value;

                // Handle most common string cases
                if ( typeof ret === "string" ) {
                    return ret.replace( rreturn, "" );
                }

                // Handle cases where value is null/undef or number
                return ret == null ? "" : ret;
            }

            return;
        }

        valueIsFunction = typeof value === "function";

        return this.each( function( i ) {
            var val;

            if ( this.nodeType !== 1 ) {
                return;
            }

            if ( valueIsFunction ) {
                val = value.call( this, i, jQuery( this ).val() );
            } else {
                val = value;
            }

            // Treat null/undefined as ""; convert numbers to string
            if ( val == null ) {
                val = "";

            } else if ( typeof val === "number" ) {
                val += "";

            } else if ( Array.isArray( val ) ) {
                val = jQuery.map( val, function( value ) {
                    return value == null ? "" : value + "";
                } );
            }

            hooks = jQuery.valHooks[ this.type ] || jQuery.valHooks[ this.nodeName.toLowerCase() ];

            // If set returns undefined, fall back to normal setting
            if ( !hooks || !( "set" in hooks ) || hooks.set( this, val, "value" ) === undefined ) {
                this.value = val;
            }
        } );
    }
} );

jQuery.extend( {
    valHooks: {
        option: {
            get: function( elem ) {

                var val = elem.getAttribute( "value" );
                return val != null ?
                    val :

                    // Support: IE <=10 - 11+
                    // option.text throws exceptions (#14686, #14858)
                    // Strip and collapse whitespace
                    // https://html.spec.whatwg.org/#strip-and-collapse-whitespace
                    stripAndCollapse( jQuery.text( elem ) );
            }
        },
        select: {
            get: function( elem ) {
                var value, option, i,
                    options = elem.options,
                    index = elem.selectedIndex,
                    one = elem.type === "select-one",
                    values = one ? null : [],
                    max = one ? index + 1 : options.length;

                if ( index < 0 ) {
                    i = max;

                } else {
                    i = one ? index : 0;
                }

                // Loop through all the selected options
                for ( ; i < max; i++ ) {
                    option = options[ i ];

                    if ( option.selected &&

                            // Don't return options that are disabled or in a disabled optgroup
                            !option.disabled &&
                            ( !option.parentNode.disabled ||
                                !nodeName( option.parentNode, "optgroup" ) ) ) {

                        // Get the specific value for the option
                        value = jQuery( option ).val();

                        // We don't need an array for one selects
                        if ( one ) {
                            return value;
                        }

                        // Multi-Selects return an array
                        values.push( value );
                    }
                }

                return values;
            },

            set: function( elem, value ) {
                var optionSet, option,
                    options = elem.options,
                    values = jQuery.makeArray( value ),
                    i = options.length;

                while ( i-- ) {
                    option = options[ i ];

                    if ( ( option.selected =
                        jQuery.inArray( jQuery.valHooks.option.get( option ), values ) > -1
                    ) ) {
                        optionSet = true;
                    }
                }

                // Force browsers to behave consistently when non-matching value is set
                if ( !optionSet ) {
                    elem.selectedIndex = -1;
                }
                return values;
            }
        }
    }
} );

// Radios and checkboxes getter/setter
jQuery.each( [ "radio", "checkbox" ], function() {
    jQuery.valHooks[ this ] = {
        set: function( elem, value ) {
            if ( Array.isArray( value ) ) {
                return ( elem.checked = jQuery.inArray( jQuery( elem ).val(), value ) > -1 );
            }
        }
    };
} );