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This data is available in the cart JSON and is included in the transaction datafeed when an order is completed — useful for syncing custom fields between your system and Foxy.\u003C\u002Fp>\u003Csection id=\"how-to-set-it-up\" data-title=\"How to set it up\" data-title-node=\"H2\">\u003Chr class=\"my-8\" style=\"margin-left: -48px; margin-right: -40vw\">\u003Ch2 data-anchor-id=\"how-to-set-it-up\">How to set it up\u003C\u002Fh2>\u003Cp>Add any parameter prefixed with \u003Ccode class=\"badge bg-soft-danger text-danger\">h:\u003C\u002Fcode> to a cart link or form:\u003C\u002Fp>\u003Cdiv class=\"position-relative w-100 overflow-hidden rounded-2\" data-code-block>\u003Cdiv class=\"d-flex justify-content-end border-bottom\" style=\"background:#2b2c3b;\">\u003Cbutton type=\"button\" class=\"btn btn-link btn-sm text-light\" title=\"Copy\" data-code-button>\u003Cspan data-code-default style=\"\">\u003Ci class=\"fal fa-copy me-2\">\u003C\u002Fi> Copy \u003C\u002Fspan>\u003Cspan class=\"text-success\" data-code-success style=\"display:none;\">\u003Ci class=\"fal fa-check ms-2\">\u003C\u002Fi> Copied \u003C\u002Fspan>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cdiv class=\"small\">\u003Cpre class=\"hljs p-2\" data-code-content>https:\u002F\u002FYOURSTORE.foxycart.com\u002Fcart?name=Product+Name&price=10.00&h:customer_id=12345\n\u003C\u002Fpre>\u003C\u002Fdiv>\u003C\u002Fdiv>\u003Cp>Multiple session variables can be added in the same request:\u003C\u002Fp>\u003Cdiv class=\"position-relative w-100 overflow-hidden rounded-2\" data-code-block>\u003Cdiv class=\"d-flex justify-content-end border-bottom\" style=\"background:#2b2c3b;\">\u003Cbutton type=\"button\" class=\"btn btn-link btn-sm text-light\" title=\"Copy\" data-code-button>\u003Cspan data-code-default style=\"\">\u003Ci class=\"fal fa-copy me-2\">\u003C\u002Fi> Copy \u003C\u002Fspan>\u003Cspan class=\"text-success\" data-code-success style=\"display:none;\">\u003Ci class=\"fal fa-check ms-2\">\u003C\u002Fi> Copied \u003C\u002Fspan>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cdiv class=\"small\">\u003Cpre class=\"hljs p-2\" data-code-content>https:\u002F\u002FYOURSTORE.foxycart.com\u002Fcart?name=Product+Name&price=10.00&h:customer_id=12345&h:affiliate_id=ABC\n\u003C\u002Fpre>\u003C\u002Fdiv>\u003C\u002Fdiv>\u003C\u002Fsection>\u003Csection id=\"accessing-session-variables-in-javascript\" data-title=\"Accessing session variables in JavaScript\" data-title-node=\"H2\">\u003Chr class=\"my-8\" style=\"margin-left: -48px; margin-right: -40vw\">\u003Ch2 data-anchor-id=\"accessing-session-variables-in-javascript\">Accessing session variables in JavaScript\u003C\u002Fh2>\u003Cp>Session variables are available in \u003Ccode class=\"badge bg-soft-danger text-danger\">FC.json.custom_fields\u003C\u002Fcode>:\u003C\u002Fp>\u003Cdiv class=\"position-relative w-100 overflow-hidden rounded-2\" data-code-block>\u003Cdiv class=\"d-flex justify-content-end border-bottom\" style=\"background:#2b2c3b;\">\u003Cbutton type=\"button\" class=\"btn btn-link btn-sm text-light\" title=\"Copy\" data-code-button>\u003Cspan data-code-default style=\"\">\u003Ci class=\"fal fa-copy me-2\">\u003C\u002Fi> Copy \u003C\u002Fspan>\u003Cspan class=\"text-success\" data-code-success style=\"display:none;\">\u003Ci class=\"fal fa-check ms-2\">\u003C\u002Fi> Copied \u003C\u002Fspan>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cdiv class=\"small\">\u003Cpre class=\"hljs p-2\" data-code-content>FC.client.on('ready.done', function() {\n  console.log(FC.json.custom_fields.customer_id);\n});\n\u003C\u002Fpre>\u003C\u002Fdiv>\u003C\u002Fdiv>\u003C\u002Fsection>\u003Csection id=\"adding-session-variables-without-adding-a-product\" data-title=\"Adding session variables without adding a product\" data-title-node=\"H2\">\u003Chr class=\"my-8\" style=\"margin-left: -48px; margin-right: -40vw\">\u003Ch2 data-anchor-id=\"adding-session-variables-without-adding-a-product\">Adding session variables without adding a product\u003C\u002Fh2>\u003Cp>Use \u003Ccode class=\"badge bg-soft-danger text-danger\">cart=view\u003C\u002Fcode> to add session variables to the cart without adding a product:\u003C\u002Fp>\u003Cdiv class=\"position-relative w-100 overflow-hidden rounded-2\" data-code-block>\u003Cdiv class=\"d-flex justify-content-end border-bottom\" style=\"background:#2b2c3b;\">\u003Cbutton type=\"button\" class=\"btn btn-link btn-sm text-light\" title=\"Copy\" data-code-button>\u003Cspan data-code-default style=\"\">\u003Ci class=\"fal fa-copy me-2\">\u003C\u002Fi> Copy \u003C\u002Fspan>\u003Cspan class=\"text-success\" data-code-success style=\"display:none;\">\u003Ci class=\"fal fa-check ms-2\">\u003C\u002Fi> Copied \u003C\u002Fspan>\u003C\u002Fbutton>\u003C\u002Fdiv>\u003Cdiv class=\"small\">\u003Cpre class=\"hljs p-2\" data-code-content>FC.client.on('ready.done', function() {\n  FC.client.request('https:\u002F\u002F' + FC.settings.storedomain + '\u002Fcart?h:foo=bar');\n});\n\u003C\u002Fpre>\u003C\u002Fdiv>\u003C\u002Fdiv>\u003C\u002Fsection>\u003Csection id=\"notes\" data-title=\"Notes\" data-title-node=\"H2\">\u003Chr class=\"my-8\" style=\"margin-left: -48px; margin-right: -40vw\">\u003Ch2 data-anchor-id=\"notes\">Notes\u003C\u002Fh2>\u003Cul>\u003Cli>\u003Cp>Session variables are not tied to products — they persist for the life of the session regardless of what products are in the cart.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Maximum value length is 700 characters.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Do not sign \u003Ccode class=\"badge bg-soft-danger text-danger\">h:\u003C\u002Fcode> values if using link and form validation.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Session variables are included in the transaction XML datafeed on a completed order.\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003C\u002Fsection>",[467,470,472,474],{"id":468,"title":339,"level":469},"how-to-set-it-up","H2",{"id":471,"title":372,"level":469},"accessing-session-variables-in-javascript",{"id":473,"title":393,"level":469},"adding-session-variables-without-adding-a-product",{"id":475,"title":414,"level":469},"notes",[477],{"type":478,"content":479},"html","\u003Cp>Session variables let you store custom data in a customer’s cart session that is not tied to any specific product. This data is available in the cart JSON and is included in the transaction datafeed when an order is completed — useful for syncing custom fields between your system and Foxy.\u003C\u002Fp>\u003Ch2>How to set it up\u003C\u002Fh2>\u003Cp>Add any parameter prefixed with \u003Ccode class=\"badge bg-soft-danger text-danger\">h:\u003C\u002Fcode> to a cart link or form:\u003C\u002Fp>\u003Cpre>\u003Ccode>https:\u002F\u002FYOURSTORE.foxycart.com\u002Fcart?name=Product+Name&price=10.00&h:customer_id=12345\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp>Multiple session variables can be added in the same request:\u003C\u002Fp>\u003Cpre>\u003Ccode>https:\u002F\u002FYOURSTORE.foxycart.com\u002Fcart?name=Product+Name&price=10.00&h:customer_id=12345&h:affiliate_id=ABC\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Ch2>Accessing session variables in JavaScript\u003C\u002Fh2>\u003Cp>Session variables are available in \u003Ccode class=\"badge bg-soft-danger text-danger\">FC.json.custom_fields\u003C\u002Fcode>:\u003C\u002Fp>\u003Cpre>\u003Ccode>FC.client.on('ready.done', function() {\n  console.log(FC.json.custom_fields.customer_id);\n});\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Ch2>Adding session variables without adding a product\u003C\u002Fh2>\u003Cp>Use \u003Ccode class=\"badge bg-soft-danger text-danger\">cart=view\u003C\u002Fcode> to add session variables to the cart without adding a product:\u003C\u002Fp>\u003Cpre>\u003Ccode>FC.client.on('ready.done', function() {\n  FC.client.request('https:\u002F\u002F' + FC.settings.storedomain + '\u002Fcart?h:foo=bar');\n});\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Ch2>Notes\u003C\u002Fh2>\u003Cul>\u003Cli>\u003Cp>Session variables are not tied to products — they persist for the life of the session regardless of what products are in the cart.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Maximum value length is 700 characters.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Do not sign \u003Ccode class=\"badge bg-soft-danger text-danger\">h:\u003C\u002Fcode> values if using link and form validation.\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp>Session variables are included in the transaction XML datafeed on a completed order.\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>",{"name":481,"created_at":482,"published_at":483,"updated_at":484,"id":485,"uuid":47,"content":486,"slug":48,"full_slug":48,"sort_by_date":59,"position":666,"tag_list":667,"is_startpage":24,"parent_id":59,"meta_data":59,"group_id":668,"first_published_at":669,"release_id":59,"lang":65,"path":59,"alternates":670,"default_full_slug":59,"translated_slugs":59},"Contact","2022-09-23T19:56:58.957Z","2025-05-08T18:24:40.382Z","2025-05-08T18:24:40.392Z",3138,{"seo":487,"_uid":490,"title":491,"action":492,"fields":493,"method":642,"columns":643,"subtitle":657,"component":48,"button_text":663,"submit_title":664,"submit_subtitle":665},{"_uid":488,"title":481,"plugin":489,"description":13},"24ff7574-3bcc-48d2-85b5-e529dfea1cc4","meta-fields","8f54f1da-9d8f-49b2-89e7-840e886491cb","We're here to help.","https:\u002F\u002Fusebasin.com\u002Ff\u002F029f48d65402",[494,499,503,613,616,621,636],{"_uid":495,"name":496,"type":332,"label":497,"options":13,"required":33,"component":498,"placeholder":13},"9a70b226-2036-4f90-a052-b3efa61c5896","name","Name","form___field",{"_uid":500,"name":501,"type":501,"label":502,"options":13,"required":33,"component":498,"placeholder":13},"86ba35be-ff43-4a28-8633-14052a8f6622","email","Email Address",{"_uid":504,"name":505,"type":506,"label":507,"options":508,"required":33,"component":498,"conditions":509,"placeholder":13},"3f827475-492c-4f97-aa1e-2386ac263b6c","topic","select","Topic","Presales, Support, Billing, Partnerships, Order Enquiry, Other",[510,567,577,584,592,600,606],{"_uid":511,"equals":512,"fields":513,"component":566},"e21d97dd-e68e-4fa6-ba97-bc40f3041dde","Order Enquiry",[514],{"_uid":515,"body":516,"type":564,"title":13,"component":565},"b64992bc-6d53-48b8-b7a0-d81e5a062e50",{"type":324,"content":517},[518],{"type":327,"content":519},[520,522,530,532,534,535,540,542,547,555,557,562],{"text":521,"type":332},"We are ",{"text":523,"type":332,"marks":524},"Foxy.io",[525],{"type":526,"attrs":527},"link",{"href":528,"uuid":59,"anchor":59,"custom":529,"target":59,"linktype":31},"http:\u002F\u002FFoxy.io",{},{"text":531,"type":332},", an ecommerce platform powering ecommerce for other merchants. We do not sell products, and are unable to assist with questions about order statuses or refunds for any merchants using our platform. Please contact the merchant you ordered from for assistance. If you’d like to report a store using Foxy for fraudulent practices, please select ‘other’ in the subject.",{"type":533},"hard_break",{"type":533},{"text":536,"type":332,"marks":537},"NOTE:",[538],{"type":539},"bold",{"text":541,"type":332}," We are ",{"text":543,"type":332,"marks":544},"not ",[545],{"type":546},"italic",{"text":548,"type":332,"marks":549},"Foxy.in",[550,554],{"type":526,"attrs":551},{"href":552,"uuid":59,"anchor":59,"custom":553,"target":59,"linktype":31},"http:\u002F\u002FFoxy.in",{},{"type":546},{"text":556,"type":332},". 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