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Update preload.js

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- Change configuration format to use built-in htmx functions

- Change defaults to mouseover/100ms
This commit is contained in:
Ben Pate 2021-01-01 21:54:24 -07:00
parent d928c7ca38
commit 8fd40ac0f7
1 changed files with 6 additions and 35 deletions
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41
src/ext/preload.js
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@ -14,42 +14,13 @@ htmx.defineExtension("preload", {
// SOME HELPER FUNCTIONS WE'LL NEED ALONG THE WAY
// closest gets the closest token value in the preload attribute of the node, so
// calling closest(node, 'wait') on this node: <div preload="on:mouseover wait:100ms">
// calling closest(node, 'wait') on this node: <div preload-wait="100ms">
// would return "100ms".
var closest = function(node, token) {
// Handle undefined inputs gracefully
if (node == undefined) {return undefined;}
// Get the attribute
var attr = node.getAttribute("preload");
// If we find a token in this attribute value, return it. Otherwise, search parent elements.
return parseToken(attr, token) || closest(node.parentElement, token);
}
// parseToken finds the value for a specific name:value pair
// embedded in an input string.
// For example, parseToken("one:1 two:2 three:3", "two") => "2"
var parseToken = function(input, name) {
// Handle undefined inputs gracefully
if (input == undefined) {
return undefined;
}
// Split options on whitespace
var options = input.split(/\s/);
// Search all options for a matching name...
for (var i = 0 ; i < options.length ; i++) {
var option = options[i].split(":");
if (option[0] === name) {
return option[1]; // ... return token value
}
}
// Nothing found, return undefined
return undefined;
var attr = "preload-" + token
node = htmx.closest(node, "[" + attr + "]")
if (node == undefined) {return undefined;}
return node.getAttribute(attr)
}
// load handles the actual HTTP fetch, and uses htmx.ajax in cases where we're
@ -101,7 +72,7 @@ htmx.defineExtension("preload", {
node.preloadState = "PAUSE";
// Get event name. Default="mousedown"
var on = closest(node, "on") || "mousedown";
var on = closest(node, "on") || "mouseover";
// One-Line monstrosity to get wait time. For mouseover events, Default=100ms. All others, default=0ms.
var wait = htmx.parseInterval(closest(node, "wait")) || ((on == "mouseover") ? 100 : 0);