diff --git a/lua/plugins/treesj.lua b/lua/plugins/treesj.lua
index aefaa78..b108833 100644
--- a/lua/plugins/treesj.lua
+++ b/lua/plugins/treesj.lua
@@ -1,7 +1,39 @@
 local treesj = require("treesj")
+local lang_utils = require("treesj.langs.utils")
+
+---@param parent_kind string
+---@param node_kind string
+local function splitjoin_attribute_value(parent_kind, node_kind)
+    return {
+        both = {
+            enable = function(tsn)
+                return tsn:parent():type() == parent_kind
+            end,
+        },
+        split = {
+            format_tree = function(tsj)
+                local str = tsj:child(node_kind)
+                local words = vim.split(str:text(), " ")
+                tsj:remove_child(node_kind)
+                for i, word in ipairs(words) do
+                    tsj:create_child({ text = word }, i + 1)
+                end
+            end,
+        },
+    }
+end
 
 treesj.setup({
     use_default_keymaps = false,
+    max_join_length = 240,
+    langs = {
+        html = lang_utils.merge_preset(require("treesj.langs.html"), {
+            ["quoted_attribute_value"] = splitjoin_attribute_value("attribute", "attribute_value"),
+        }),
+        javascript = lang_utils.merge_preset(require("treesj.langs.javascript"), {
+            ["string"] = splitjoin_attribute_value("jsx_attribute", "string_fragment"),
+        }),
+    },
 })
 
 vim.keymap.set("n", "<leader>j", treesj.toggle)